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.

A302557 Expansion of 1/(2 - Sum_{k>=0} k!*x^k/(1 + x)^(k+1)).

Table of values

n a(n)
0 1
1 0
2 1
3 2
4 10
5 48
6 288
7 1984
8 15660
9 139312
10 1380484
11 15080152
12 180017780
13 2331038048
14 32537274756
15 486942025288
16 7777172706308
17 132025174277392
18 2373753512469972
19 45059504242538328
20 900498975768121972
21 18898334957168597184
22 415537355533831049572
23 9552918187197519923176

List of values

[1, 0, 1, 2, 10, 48, 288, 1984, 15660, 139312, 1380484, 15080152, 180017780, 2331038048, 32537274756, 486942025288, 7777172706308, 132025174277392, 2373753512469972, 45059504242538328, 900498975768121972, 18898334957168597184, 415537355533831049572, 9552918187197519923176]