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.

A228837 a(n) = Sum_{k=0..[n/2]} binomial((n-k)^2, (n-2*k)*k).

Table of values

n a(n)
0 1
1 1
2 2
3 5
4 38
5 597
6 14472
7 554653
8 44421258
9 8933194659
10 3408672951784
11 1984802013951149
12 1803179670478111304
13 3323206887194925488269
14 15156709454119350064982141
15 132889643918499982093215167857
16 1784438297905511051093397284187186

List of values

[1, 1, 2, 5, 38, 597, 14472, 554653, 44421258, 8933194659, 3408672951784, 1984802013951149, 1803179670478111304, 3323206887194925488269, 15156709454119350064982141, 132889643918499982093215167857, 1784438297905511051093397284187186]