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.

A218680 O.g.f.: A(x) = Sum_{n>=0} n^n*x^n/(1-n*x)^(2*n)/n! * exp(-n*x/(1-n*x)^2).

Table of values

n a(n)
0 1
1 1
2 3
3 16
4 111
5 911
6 8622
7 91414
8 1067579
9 13564195
10 185687381
11 2718184470
12 42288343176
13 695667651368
14 12049465530936
15 218945489692574
16 4160440403683643
17 82448824370010887
18 1699889286488298603
19 36384381642357676480
20 806926050321577391347
21 18510872795071148287531

List of values

[1, 1, 3, 16, 111, 911, 8622, 91414, 1067579, 13564195, 185687381, 2718184470, 42288343176, 695667651368, 12049465530936, 218945489692574, 4160440403683643, 82448824370010887, 1699889286488298603, 36384381642357676480, 806926050321577391347, 18510872795071148287531]