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.

A222764 Number of nX3 0..1 arrays with exactly floor(nX3/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..1 order.

Table of values

n a(n)
1 0
2 4
3 13
4 96
5 301
6 2242
7 7575
8 55958
9 196442
10 1448568
11 5188656
12 38338122
13 138866688
14 1029494580
15 3754449699
16 27929878716
17 102325331440
18 763577070328
19 2806916894109
20 21001612120424
21 77405327921654
22 580452846750048

List of values

[0, 4, 13, 96, 301, 2242, 7575, 55958, 196442, 1448568, 5188656, 38338122, 138866688, 1029494580, 3754449699, 27929878716, 102325331440, 763577070328, 2806916894109, 21001612120424, 77405327921654, 580452846750048]

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

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