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.

A036676 Used by Polya in calculating A000598.

Original entry on oeis.org

0, 0, 0, 0, 1, 3, 8, 20, 46, 102, 220, 461, 948, 1921, 3836, 7574, 14810, 28705, 55212, 105485, 200300, 378262, 710795, 1329603, 2476817, 4596297, 8499396, 15665681, 28786696, 52747907, 96398485, 175735593, 319623891, 580054269
Offset: 0

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Keywords

Formula

G.f.: x * q(x) * (q(x)^3 - 3*q(x)*q(x^2) + 2*q(x^3)) / 6 where q(x) is the g.f. of A000621 with offset 0 [from Polya]. - Sean A. Irvine, Nov 21 2020

Extensions

a(33) corrected by Sean A. Irvine, Nov 21 2020