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.

A266490 E.g.f. A(x) satisfies: A(x) = exp( Integral B(x) dx ) such that B(x) = exp(2*x) * exp( Integral A(x) dx ), where the constant of integration is zero.

Table of values

n a(n)
0 1
1 1
2 4
3 20
4 126
5 972
6 8876
7 93580
8 1119328
9 14986944
10 222184136
11 3614288272
12 64022264176
13 1226914925840
14 25295189791296
15 558317369479616
16 13136590271813856
17 328243850207690432
18 8680766764223956416
19 242245419192494844096
20 7113910552105144027136
21 219304957649505551899136
22 7081169542830272102170752
23 238996807468258679150596352

List of values

[1, 1, 4, 20, 126, 972, 8876, 93580, 1119328, 14986944, 222184136, 3614288272, 64022264176, 1226914925840, 25295189791296, 558317369479616, 13136590271813856, 328243850207690432, 8680766764223956416, 242245419192494844096, 7113910552105144027136, 219304957649505551899136, 7081169542830272102170752, 238996807468258679150596352]