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.

A222324 Number of nX4 0..1 arrays with exactly floor(nX4/2) 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 3
2 7
3 19
4 52
5 165
6 835
7 3307
8 14419
9 66213
10 302731
11 1350601
12 6283864
13 28864821
14 132830017
15 617677553
16 2862431936
17 13363660417
18 62171655121
19 291908874951
20 1362607426103
21 6418589261153
22 30080186463929
23 142028701850239

List of values

[3, 7, 19, 52, 165, 835, 3307, 14419, 66213, 302731, 1350601, 6283864, 28864821, 132830017, 617677553, 2862431936, 13363660417, 62171655121, 291908874951, 1362607426103, 6418589261153, 30080186463929, 142028701850239]

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

Content is available under The OEIS End-User License Agreement.