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Displaying 1-4 of 4 results found.

page 1

Elevator buttons in U.S.A.

+20
4

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69 (list; graph; listen)

	OFFSET	`1,2`
	LINKS	`Eric Weisstein's World of Mathematics, Triskaidekaphobia`
	CROSSREFS	`Cf. A085265.` `Sequence in context: A043318 A044915 A161951 this_sequence A085265 A023806 A113763` `Adjacent sequences: A011757 A011758 A011759 this_sequence A011761 A011762 A011763`
	KEYWORD	`nonn,nice`
	AUTHOR	`Juan-Carlos Lerman (jclerm(AT)aztec.asu.edu)`

A023806

Xenodromes: all digits in base 12 are different.

+20
2

0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 66, 67, 68, 69, 70, 71, 72, 73 (list; graph; listen)

	OFFSET	`0,3`
	CROSSREFS	`Sequence in context: A161951 A011760 A085265 this_sequence A113763 A023754 A085824` `Adjacent sequences: A023803 A023804 A023805 this_sequence A023807 A023808 A023809`
	KEYWORD	`nonn,base,fini,easy`
	AUTHOR	`Olivier Gerard (olivier.gerard(AT)gmail.com)`

A113763

Non-multiples of (12+1), or numbers not divisible by (12+1).

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2

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`Cf. A011760 Elevator buttons in U.S.A. A023806 Xenodromes: all digits in base 12 are different.`
	LINKS	`Eric Weisstein's World of Mathematics, Triskaidekaphobia`
	FORMULA	`a(n) = n+floor((2n-1)/24) = n+quotient(2n-1, 24)`
	MATHEMATICA	`Table[n+Quotient[2n-1, 24], {n, 1, 85}]; (* or *)Table[n+Floor[(2n-1)/24], {n, 1, 85}]`
	PROGRAM	`(Other) sage: [i for i in range(80) if gcd(13, i) == 1] [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Apr 21 2009]`
	CROSSREFS	`Cf. A011760, A023806.` `Sequence in context: A011760 A085265 A023806 this_sequence A023754 A085824 A014157` `Adjacent sequences: A113760 A113761 A113762 this_sequence A113764 A113765 A113766`
	KEYWORD	`nonn`
	AUTHOR	`Zak Seidov (zakseidov(AT)yahoo.com), Jan 18 2006`

A023754

Plaindromes: digits in base 13 are in ascending order.

+20
1

0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 56, 57, 58, 59, 60, 61, 62, 63, 64, 70, 71, 72, 73, 74, 75, 76, 77, 84, 85, 86, 87, 88, 89, 90 (list; graph; listen)

	OFFSET	`0,3`
	CROSSREFS	`Sequence in context: A085265 A023806 A113763 this_sequence A085824 A014157 A026467` `Adjacent sequences: A023751 A023752 A023753 this_sequence A023755 A023756 A023757`
	KEYWORD	`nonn,base,easy`
	AUTHOR	`Olivier Gerard (olivier.gerard(AT)gmail.com)`

page 1

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Last modified November 23 17:09 EST 2009. Contains 167438 sequences.

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