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.

A323630 Expansion of e.g.f. exp(log(1 - x)^2/2)/(1 - x). This is also the transform of the involution numbers given by the signless Stirling cycle numbers.

Table of values

n a(n)
0 1
1 1
2 3
3 12
4 62
5 390
6 2884
7 24472
8 234086
9 2490030
10 29139306
11 371878056
12 5138306700
13 76398336924
14 1215973642584
15 20624305367520
16 371309259462972
17 7071037633297116
18 141997246553420052
19 2998654325698019280
20 66426777891686458728
21 1540117294435707244488
22 37296711627004301923056

List of values

[1, 1, 3, 12, 62, 390, 2884, 24472, 234086, 2490030, 29139306, 371878056, 5138306700, 76398336924, 1215973642584, 20624305367520, 371309259462972, 7071037633297116, 141997246553420052, 2998654325698019280, 66426777891686458728, 1540117294435707244488, 37296711627004301923056]