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.

A188253 Number of arrangements of 7 nonzero numbers x(i) in -n..n with the sum of x(i)*x(i+1) equal to zero.

Table of values

n a(n)
1 40
2 1284
3 12692
4 58824
5 193232
6 521124
7 1142180
8 2347608
9 4323448
10 7567844
11 12129300
12 19691552
13 29057776
14 42900188
15 61593740
16 86648240

List of values

[40, 1284, 12692, 58824, 193232, 521124, 1142180, 2347608, 4323448, 7567844, 12129300, 19691552, 29057776, 42900188, 61593740, 86648240]