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.

A222773 Number of 5Xn 0..1 arrays with exactly floor(5Xn/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 48
3 301
4 3431
5 19766
6 256546
7 1570588
8 21526008
9 136549058
10 1916013454
11 12429454430
12 176824724591
13 1163475046332
14 16694274193142
15 110869265032135
16 1600019787081011
17 10694449471174787
18 154977656102006006

List of values

[0, 48, 301, 3431, 19766, 256546, 1570588, 21526008, 136549058, 1916013454, 12429454430, 176824724591, 1163475046332, 16694274193142, 110869265032135, 1600019787081011, 10694449471174787, 154977656102006006]

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

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