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.

A305406 Expansion of Sum_{k>=0} binomial(2*k,k)*x^k/Product_{j=1..k} (1 - j*x).

Table of values

n a(n)
0 1
1 2
2 8
3 40
4 234
5 1544
6 11242
7 89016
8 758504
9 6900012
10 66590782
11 678322704
12 7262393832
13 81431657220
14 953339019606
15 11622207372104
16 147199295291518
17 1932876310310488
18 26265519359529974
19 368752956750812256
20 5340795881536757632
21 79691179458925839676
22 1223524383429928039306

List of values

[1, 2, 8, 40, 234, 1544, 11242, 89016, 758504, 6900012, 66590782, 678322704, 7262393832, 81431657220, 953339019606, 11622207372104, 147199295291518, 1932876310310488, 26265519359529974, 368752956750812256, 5340795881536757632, 79691179458925839676, 1223524383429928039306]