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%I #5 Dec 24 2014 16:11:16
%S 238,1125,5567,28642,148002,771768,4034881,21118867,110669161,
%T 580192543,3042199896,15954252572,83676184647,438866555650,
%U 2301856594765,12073355842878,63325661038166,332149215192824,1742159173884376
%N Number of (n+2)X(1+2) 0..3 arrays with every consecutive three elements in every row and column having exactly 2 distinct values, in every diagonal 1 or 2 distinct values, in every antidiagonal 2 or 3 distinct values, and new values 0 upwards introduced in row major order
%C Column 1 of A252910
%H R. H. Hardin, <a href="/A252905/b252905.txt">Table of n, a(n) for n = 1..210</a>
%H R. H. Hardin, <a href="/A252905/a252905.txt">Empirical recurrence of order 63</a>
%F Empirical recurrence of order 63 (see link above)
%e Some solutions for n=2
%e ..0..0..1....0..1..0....0..0..1....0..1..1....0..1..0....0..1..1....0..1..1
%e ..0..2..2....0..2..2....2..2..1....2..2..1....0..1..1....1..0..1....0..1..1
%e ..2..0..2....3..2..2....2..0..2....2..1..2....1..0..1....0..1..0....2..0..0
%e ..0..0..3....0..1..0....3..2..2....0..2..2....0..0..2....0..1..1....2..0..0
%K nonn
%O 1,1
%A _R. H. Hardin_, Dec 24 2014