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.

A181168 G.f.: 1 = 1/(1+x) + Sum_{n>=1} a(n)*C(2n,n-1)*x^n* Sum_{k>=0} C(2n+k,k)^2*(-x)^k.

Table of values

n a(n)
1 1
2 2
3 11
4 114
5 1892
6 45800
7 1520535
8 66256610
9 3666164264
10 251038266192
11 20835983387100
12 2060833345614120
13 239466622145739120
14 32297762247056413536
15 5003953730422122499023
16 882564184814509784837250

List of values

[1, 2, 11, 114, 1892, 45800, 1520535, 66256610, 3666164264, 251038266192, 20835983387100, 2060833345614120, 239466622145739120, 32297762247056413536, 5003953730422122499023, 882564184814509784837250]