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.

A365973 Expansion of e.g.f. exp( Sum_{k>=0} x^(4*k+3) / (4*k+3) ).

Table of values

n a(n)
0 1
1 0
2 0
3 2
4 0
5 0
6 40
7 720
8 0
9 2240
10 172800
11 3628800
12 246400
13 49420800
14 3531340800
15 87223136000
16 18450432000
17 3006222336000
18 225434879488000
19 6411312940032000
20 2744461025280000
21 435228787435520000
22 35074217524469760000
23 1126838040745697280000

List of values

[1, 0, 0, 2, 0, 0, 40, 720, 0, 2240, 172800, 3628800, 246400, 49420800, 3531340800, 87223136000, 18450432000, 3006222336000, 225434879488000, 6411312940032000, 2744461025280000, 435228787435520000, 35074217524469760000, 1126838040745697280000]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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