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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.

A219005 Unmatched value maps: number of 4Xn binary arrays indicating the locations of corresponding elements not equal to any horizontal, diagonal or antidiagonal neighbor in a random 0..2 4Xn array.

Table of values

n a(n)
1 1
2 126
3 2374
4 31857
5 462668
6 7027671
7 105807897
8 1583929029
9 23732266546
10 355842741628
11 5335066750849

List of values

[1, 126, 2374, 31857, 462668, 7027671, 105807897, 1583929029, 23732266546, 355842741628, 5335066750849]

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

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