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.

A222325 Number of nX5 0..1 arrays with exactly floor(nX5/2) 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 4
2 0
3 0
4 165
5 674
6 3770
7 15100
8 172590
9 759758
10 6657106
11 30994294
12 298933498
13 1368656291
14 12779873412
15 59202186592
16 560870492027
17 2605855916653
18 24609622243330
19 114661599066810
20 1086770275159481
21 5073242396321810

List of values

[4, 0, 0, 165, 674, 3770, 15100, 172590, 759758, 6657106, 30994294, 298933498, 1368656291, 12779873412, 59202186592, 560870492027, 2605855916653, 24609622243330, 114661599066810, 1086770275159481, 5073242396321810]

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

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