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.

A188365 a(n) = n! * [x^n] exp((1 - 2*x)/(1 - 3*x + x^2) - 1).

Table of values

n a(n)
0 1
1 1
2 5
3 43
4 505
5 7421
6 130501
7 2668975
8 62197073
9 1626103225
10 47116726021
11 1498191224531
12 51855200633545
13 1940384578283893
14 78042911672096645
15 3357060094366363351
16 153771739817047383841
17 7471843888639307665265
18 383835896530177022152453
19 20783664252941721959512315

List of values

[1, 1, 5, 43, 505, 7421, 130501, 2668975, 62197073, 1626103225, 47116726021, 1498191224531, 51855200633545, 1940384578283893, 78042911672096645, 3357060094366363351, 153771739817047383841, 7471843888639307665265, 383835896530177022152453, 20783664252941721959512315]