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.

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A038360 Ranks of certain relations among Euler sums of weight n.

Original entry on oeis.org

1, 3, 6, 14, 29, 60, 123, 249, 503, 1012, 2032, 4075, 8164, 16347, 32719, 65471, 130986, 262030, 524137, 1048376, 2096887, 4193953, 8388143, 16776600, 33553616, 67107783, 134216296, 268433559, 536868399, 1073738495, 2147479238, 4294961454, 8589926853, 17179858932, 34359724787, 68719458745, 137438929639, 274877875372
Offset: 3

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Comments

It is conjectured that this is (apart from offset) the same as A216714.

Programs

  • Mathematica
    a[n_] := 2^(n-2) - SeriesCoefficient[(1-x^2)/(1-x^2-x^3), {x, 0, n+3}];
    Table[a[n], {n, 3, 40}] (* Jean-François Alcover, Jul 29 2018, after R. J. Mathar *)

Formula

a(n) = A000079(n-2) - A000931(n+3) [Saito]. - R. J. Mathar, Jul 22 2017

Extensions

More terms from Jean-François Alcover, Jul 29 2018
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