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A231127 Number of (n+1)X(4+1) white-square subarrays of 0..2 arrays with no element equal to a strict majority of its diagonal and antidiagonal neighbors, with values 0..2 introduced in row major order.

%I A231127 #6 Jul 23 2025 06:15:58
%S A231127 16,176,2260,27664,336004,4150352,50257244,621150768,7520563372,
%T A231127 92952785328,1125418461348,13909988936720,168414092245220,
%U A231127 2081570967982416,25202456511185596,311498292593207728
%N A231127 Number of (n+1)X(4+1) white-square subarrays of 0..2 arrays with no element equal to a strict majority of its diagonal and antidiagonal neighbors, with values 0..2 introduced in row major order.
%C A231127 Column 4 of A231131
%H A231127 R. H. Hardin, <a href="/A231127/b231127.txt">Table of n, a(n) for n = 1..210</a>
%F A231127 Empirical: a(n) = 175*a(n-2) -4017*a(n-4) +34311*a(n-6) -146236*a(n-8) +322472*a(n-10) -291040*a(n-12) +116032*a(n-14) -24064*a(n-16) +1024*a(n-18)
%e A231127 Some solutions for n=4
%e A231127 ..0..x..1..x..2....0..x..1..x..2....0..x..0..x..0....0..x..1..x..2
%e A231127 ..x..1..x..0..x....x..2..x..0..x....x..1..x..2..x....x..2..x..0..x
%e A231127 ..0..x..0..x..2....0..x..1..x..2....2..x..0..x..2....0..x..1..x..2
%e A231127 ..x..1..x..0..x....x..1..x..2..x....x..1..x..0..x....x..2..x..1..x
%e A231127 ..0..x..0..x..2....2..x..1..x..1....2..x..2..x..2....1..x..0..x..0
%K A231127 nonn
%O A231127 1,1
%A A231127 _R. H. Hardin_, Nov 04 2013