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.

A365977 Expansion of e.g.f. 1 / ( 1 - Sum_{k>=0} x^(5*k+1) / (5*k+1) ).

Table of values

n a(n)
0 1
1 1
2 2
3 6
4 24
5 120
6 840
7 6720
8 60480
9 604800
10 6652800
11 83462400
12 1138233600
13 16746912000
14 264176640000
15 4444771968000
16 80719172352000
17 1556132497920000
18 31722198842880000
19 681437830993920000
20 15378172899747840000
21 366025806545817600000

List of values

[1, 1, 2, 6, 24, 120, 840, 6720, 60480, 604800, 6652800, 83462400, 1138233600, 16746912000, 264176640000, 4444771968000, 80719172352000, 1556132497920000, 31722198842880000, 681437830993920000, 15378172899747840000, 366025806545817600000]