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.

A188355 Number of arrangements of n+1 numbers x(i) in -6..6 with the sum of x(i)*x(i+1) equal to zero.

Table of values

n a(n)
1 25
2 325
3 1205
4 14477
5 100885
6 1171345
7 11535493
8 136061137
9 1540834589
10 18592832393
11 222616829157
12 2732659664405
13 33554957179729
14 416689678586229
15 5184974750699645
16 64895937068447245
17 813946908435419257

List of values

[25, 325, 1205, 14477, 100885, 1171345, 11535493, 136061137, 1540834589, 18592832393, 222616829157, 2732659664405, 33554957179729, 416689678586229, 5184974750699645, 64895937068447245, 813946908435419257]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement.