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A104652
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Numbers k such that 29*k^2 + 29*k +1 = n^2, n sequence = A104651.
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1
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OFFSET
| 1,2
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LINKS
| Index to sequences with linear recurrences with constant coefficients, signature (1,0,19602,-19602,0,1,-1).
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FORMULA
| define a(1)=0, a(2)=32, a(3)=3080, a(4)=19602*a(1)+9800-a(3), a(5)=19602*a(2)+9800-a(2), a(6)=19602*a(3)+9800-a(1), then a(n)=19602*a(n-3)+9800-a(n-6)
G.f. 8*x^2*(4+381*x+455*x^2+381*x^3+4*x^4) / ( (x-1)*(x^6+19602*x^3-1) ). - R. J. Mathar, Aug 23 2011
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CROSSREFS
| Cf. A104651.
Sequence in context: A113500 A064018 A067321 * A135787 A016793 A123802
Adjacent sequences: A104649 A104650 A104651 * A104653 A104654 A104655
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KEYWORD
| nonn,easy
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AUTHOR
| Pierre CAMI (pierre-cami(AT)bbox.fr), Apr 22 2005
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