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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.

A219358 G.f. satisfies: A(x) = Sum_{n>=0} n! * x^n * A(x)^(n*(n-1)/2).

Table of values

n a(n)
0 1
1 1
2 2
3 8
4 46
5 334
6 2882
7 28604
8 320248
9 3993184
10 54942740
11 828086732
12 13586200504
13 241294019584
14 4615319816192
15 94629675177320
16 2070911506927360
17 48185049542009248
18 1187816429730925424
19 30923773410431125424
20 847808674826433774928
21 24414218135569507213312

List of values

[1, 1, 2, 8, 46, 334, 2882, 28604, 320248, 3993184, 54942740, 828086732, 13586200504, 241294019584, 4615319816192, 94629675177320, 2070911506927360, 48185049542009248, 1187816429730925424, 30923773410431125424, 847808674826433774928, 24414218135569507213312]

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

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