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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.

A222322 Number of nX2 0..1 arrays with exactly floor(nX2/2) elements unequal to at least one king-move neighbor, with new values introduced in row major 0..1 order.

Table of values

n a(n)
1 0
2 0
3 0
4 7
5 0
6 32
7 0
8 168
9 0
10 948
11 0
12 5279
13 0
14 29868
15 0
16 170435
17 0
18 978324
19 0
20 5646204
21 0
22 32726780
23 0
24 190380464
25 0
26 1110922620
27 0
28 6499777527
29 0
30 38116781580
31 0
32 223982494824
33 0
34 1318530693372
35 0
36 7774269747257
37 0
38 45903969026388
39 0

List of values

[0, 0, 0, 7, 0, 32, 0, 168, 0, 948, 0, 5279, 0, 29868, 0, 170435, 0, 978324, 0, 5646204, 0, 32726780, 0, 190380464, 0, 1110922620, 0, 6499777527, 0, 38116781580, 0, 223982494824, 0, 1318530693372, 0, 7774269747257, 0, 45903969026388, 0]

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

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