cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A016828 a(n) = (4*n+2)^4.

Original entry on oeis.org

16, 1296, 10000, 38416, 104976, 234256, 456976, 810000, 1336336, 2085136, 3111696, 4477456, 6250000, 8503056, 11316496, 14776336, 18974736, 24010000, 29986576, 37015056, 45212176, 54700816, 65610000, 78074896, 92236816
Offset: 0

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Formula

a(n) = 16*A016756(n). O.g.f.: -16*(1+76*x+230*x^2+76*x^3+x^4)/(-1+x)^5. - R. J. Mathar, Mar 31 2008
From Ilya Gutkovskiy, Jun 21 2016: (Start)
a(n) = 5*a(n-1) - 10*a(n-2) + 10*a(n-3) - 5*a(n-4) + a(n-5).
Sum_{n>=0} 1/a(n) = Pi^4/1536. (End)

Extensions

More terms from R. J. Mathar, Mar 31 2008