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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.

A229378 Number of nX6 0..2 arrays avoiding 11 horizontally, 22 vertically and 00 diagonally or antidiagonally.

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%I A229378 #6 Jul 23 2025 05:41:56
%S A229378 448,8818,346598,11441370,407900408,13999334726,492938029980,
%T A229378 17047266083040,597865838000740,20740608165866648,725812479117899160,
%U A229378 25224055021486126018,881505120022046301944,30668872473833482523122
%N A229378 Number of nX6 0..2 arrays avoiding 11 horizontally, 22 vertically and 00 diagonally or antidiagonally.
%C A229378 Column 6 of A229380
%H A229378 R. H. Hardin, <a href="/A229378/b229378.txt">Table of n, a(n) for n = 1..210</a>
%e A229378 Some solutions for n=3
%e A229378 ..0..0..1..2..1..0....0..0..2..0..2..2....0..0..1..0..0..0....0..1..0..2..2..2
%e A229378 ..1..2..2..1..2..1....2..2..1..0..1..0....2..1..2..1..2..1....1..2..2..1..0..1
%e A229378 ..2..0..0..2..1..2....0..1..2..2..2..0....0..2..1..2..0..0....1..0..0..2..2..2
%K A229378 nonn
%O A229378 1,1
%A A229378 _R. H. Hardin_ Sep 21 2013

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