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.

A333096 a(n) = the n-th order Taylor polynomial (centered at 0) of c(x)^(4*n) evaluated at x = 1, where c(x) = (1 - sqrt(1 - 4*x))/(2*x) is the o.g.f. of the sequence of Catalan numbers A000108.

Table of values

n a(n)
0 1
1 5
2 53
3 647
4 8373
5 111880
6 1525511
7 21093476
8 294663349
9 4148593604
10 58770091928
11 836722722951
12 11961868391175
13 171601856667701
14 2469036254872996
15 35615467194043147
16 514888180699419829
17 7458193213805231529
18 108219144962546395364
19 1572690742149983040857

List of values

[1, 5, 53, 647, 8373, 111880, 1525511, 21093476, 294663349, 4148593604, 58770091928, 836722722951, 11961868391175, 171601856667701, 2469036254872996, 35615467194043147, 514888180699419829, 7458193213805231529, 108219144962546395364, 1572690742149983040857]