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.

A188247 Number of arrangements of n+2 nonzero numbers x(i) in -7..7 with the sum of x(i)*x(i+1) equal to zero.

Table of values

n a(n)
1 196
2 532
3 10564
4 75080
5 1142180
6 11953848
7 168083116
8 2026547348
9 27843005992
10 355600251460
11 4851985495460
12 63719148177636
13 867980001700376
14 11577646834184824
15 157763834094118596

List of values

[196, 532, 10564, 75080, 1142180, 11953848, 168083116, 2026547348, 27843005992, 355600251460, 4851985495460, 63719148177636, 867980001700376, 11577646834184824, 157763834094118596]

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

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