id:A058274 - OEIS Search Results

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An approximation to sigma_{5/2}(n): ceiling( sum_{d|n} d^(5/2) ).

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1, 7, 17, 39, 57, 111, 131, 220, 260, 379, 403, 642, 611, 870, 944, 1244, 1193, 1729, 1575, 2200, 2168, 2679, 2538, 3645, 3182, 4063, 4048, 5051, 4530, 6284, 5352, 7037, 6674, 7939, 7434, 10035, 8329, 10482, 10125, 12500, 10765, 14427 (list; graph; listen)

	OFFSET	`1,2`
	MAPLE	`f := proc(n) local d, t1, t2; t2 := 0; t1 := divisors(n); for d in t1 do t2 := t2 + d^(5/2) end do; t2; end proc; # exact value of sigma_{5/2}(n)`
	CROSSREFS	`Sequence in context: A140121 A102770 A058273 this_sequence A124965 A107178 A104164` `Adjacent sequences: A058271 A058272 A058273 this_sequence A058275 A058276 A058277`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Dec 08 2000`

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

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