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.

A231224 Number of (n+2)X(5+2) 0..2 arrays with no element unequal to a strict majority of its horizontal, vertical, diagonal and antidiagonal neighbors, with values 0..2 introduced in row major order.

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%I A231224 #6 Jul 23 2025 06:19:18
%S A231224 11,45,185,812,4298,19935,102113,524113,2687777,14197596,74308295,
%T A231224 393206009,2088107591,11086538469,59103852278,315153667732,
%U A231224 1682280633028,8989204931719,48042619335921,256910321615776,1374182610970469
%N A231224 Number of (n+2)X(5+2) 0..2 arrays with no element unequal to a strict majority of its horizontal, vertical, diagonal and antidiagonal neighbors, with values 0..2 introduced in row major order.
%C A231224 Column 5 of A231227
%H A231224 R. H. Hardin, <a href="/A231224/b231224.txt">Table of n, a(n) for n = 1..210</a>
%e A231224 Some solutions for n=5
%e A231224 ..0..0..0..1..1..1..1....0..0..0..1..1..1..1....0..0..0..0..0..0..0
%e A231224 ..0..0..0..1..1..1..1....0..0..0..1..1..1..1....0..0..0..0..0..0..0
%e A231224 ..0..0..0..1..1..1..1....0..0..0..1..1..1..1....1..1..0..0..1..1..1
%e A231224 ..2..2..0..0..1..1..1....0..0..0..1..1..1..1....1..1..1..1..1..1..1
%e A231224 ..2..2..2..0..0..0..0....0..0..1..1..1..1..1....1..1..1..0..0..0..0
%e A231224 ..2..2..2..2..0..0..0....1..1..1..1..1..1..1....1..1..0..0..0..0..0
%e A231224 ..2..2..2..2..0..0..0....1..1..1..1..1..1..1....1..1..0..0..0..0..0
%K A231224 nonn
%O A231224 1,1
%A A231224 _R. H. Hardin_, Nov 05 2013