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.

A218845 Unmatched value maps: number of 4Xn binary arrays indicating the locations of corresponding elements not equal to any horizontal or antidiagonal neighbor in a random 0..1 4Xn array.

Table of values

n a(n)
1 1
2 65
3 436
4 3617
5 26635
6 201960
7 1530846
8 11617859
9 88207678
10 669575111
11 5082650645
12 38581655789
13 292872656082
14 2223190550341
15 16876170296292
16 128106451991984
17 972451948238336
18 7381852115978817
19 56035406540101182

List of values

[1, 65, 436, 3617, 26635, 201960, 1530846, 11617859, 88207678, 669575111, 5082650645, 38581655789, 292872656082, 2223190550341, 16876170296292, 128106451991984, 972451948238336, 7381852115978817, 56035406540101182]

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

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