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Search: id:A106175
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| A106175 |
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Numbers n such that n^2 = 67*(k^2) + 67*k + 1. |
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+0
2
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| 1, 135, 11791, 3186521, 278253009, 14755412411, 24297576265, 1288470373299, 112511657189035, 30406305506223725, 2655135804746536821, 140798562959107191995, 231851453975691325309, 12294795423043604534211
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OFFSET
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1,2
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FORMULA
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a(1)=1, a(2)=135, a(3)=11791, a(4)=3186521, a(5)=278253009, a(6)=14755412411, a(7)=9542163854*a(1)+a(6), a(8)=9542163854*a(2)+a(5), a(9)=9542163854*a(3)+a(4), a(10)=9542163854*a(4)+a(3), a(11)=9542163854*a(5)+a(2), a(12)=9542163854*a(6)+a(1), then a(n)=9542163854*a(n-6)-a(n-12)
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CROSSREFS
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Cf. A106176.
Sequence in context: A051028 A076011 A132054 this_sequence A051307 A056740 A065663
Adjacent sequences: A106172 A106173 A106174 this_sequence A106176 A106177 A106178
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KEYWORD
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nonn
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AUTHOR
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Pierre CAMI (pierrecami(AT)tele2.fr), Apr 24 2005
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