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.

A213507 E.g.f.: exp( Sum_{n>=1} A000108(n)*x^n/n ), where A000108(n) = binomial(2*n,n)/(n+1) forms the Catalan numbers.

Table of values

n a(n)
0 1
1 1
2 3
3 17
4 149
5 1809
6 28399
7 550297
8 12732873
9 343231361
10 10576764251
11 367054970721
12 14173669352413
13 602974492511377
14 28027436035348359
15 1413479599558432169
16 76879014760731439889
17 4486205132570631391617
18 279595430611791210216883
19 18536284947404377562405041

List of values

[1, 1, 3, 17, 149, 1809, 28399, 550297, 12732873, 343231361, 10576764251, 367054970721, 14173669352413, 602974492511377, 28027436035348359, 1413479599558432169, 76879014760731439889, 4486205132570631391617, 279595430611791210216883, 18536284947404377562405041]