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.

A326860 E.g.f.: Product_{k>=1} (1 + x^(3*k-1)/(3*k-1)) / (1 - x^(3*k-1)/(3*k-1)).

Table of values

n a(n)
0 1
1 0
2 2
3 0
4 12
5 48
6 180
7 2016
8 15120
9 72576
10 1424304
11 11249280
12 113164128
13 2066238720
14 22751977248
15 303261573888
16 6400216892160
17 85934653249536
18 1440131337066240
19 34330891188013056
20 549029461368181248
21 11212163885207900160
22 296439802585781976576

List of values

[1, 0, 2, 0, 12, 48, 180, 2016, 15120, 72576, 1424304, 11249280, 113164128, 2066238720, 22751977248, 303261573888, 6400216892160, 85934653249536, 1440131337066240, 34330891188013056, 549029461368181248, 11212163885207900160, 296439802585781976576]