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.

A206155 G.f.: exp( Sum_{n>=1} A206156(n)*x^n/n ), where A206156(n) = Sum_{k=0..n} binomial(n,k)^(2*k).

Table of values

n a(n)
0 1
1 2
2 5
3 38
4 1425
5 283002
6 448468978
7 2707673843860
8 67018498701021670
9 14506787732148113566364
10 13603174532364904984495776225
11 43960529641219941452921634596223366
12 1207327102995668834632770987833295579308107
13 188859837731175560954429490131760211759694331013582

List of values

[1, 2, 5, 38, 1425, 283002, 448468978, 2707673843860, 67018498701021670, 14506787732148113566364, 13603174532364904984495776225, 43960529641219941452921634596223366, 1207327102995668834632770987833295579308107, 188859837731175560954429490131760211759694331013582]