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.

A193441 E.g.f.: exp( Sum_{n>=1} n!^2*x^(2*n)/(2*n)! ) = Sum_{n>=0} a(n)*x^(2*n)/(2*n)!.

Table of values

n a(n)
0 1
1 1
2 7
3 111
4 3089
5 131985
6 7977687
7 645443295
8 67165412385
9 8722553971041
10 1380689271177255
11 261365482010524815
12 58252017195624969009
13 15086874107373899187825
14 4490370671139664566269175
15 1521257907398602231501780095
16 581762614758928225569542394945

List of values

[1, 1, 7, 111, 3089, 131985, 7977687, 645443295, 67165412385, 8722553971041, 1380689271177255, 261365482010524815, 58252017195624969009, 15086874107373899187825, 4490370671139664566269175, 1521257907398602231501780095, 581762614758928225569542394945]