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%I #4 Dec 19 2013 18:00:41
%S 469,4757,47933,484731,4909103,49779251,505273311,5132833317,
%T 52176901353,530689037697,5400110298073,54970941475239,
%U 559763882549955,5701582841549151,58087981854053195,591918422269666865
%N Number of (n+1)X(2+1) 0..6 arrays with every 2X2 subblock having the absolute values of all six edge and diagonal differences no larger than 1
%C Column 2 of A234131
%H R. H. Hardin, <a href="/A234125/b234125.txt">Table of n, a(n) for n = 1..210</a>
%F Empirical: a(n) = 26*a(n-1) -218*a(n-2) +474*a(n-3) +1603*a(n-4) -5034*a(n-5) -4660*a(n-6) +14440*a(n-7) +7897*a(n-8) -13910*a(n-9) -6694*a(n-10) +2654*a(n-11) +581*a(n-12) -250*a(n-13) +20*a(n-14)
%e Some solutions for n=3
%e ..3..3..2....1..0..1....4..4..4....3..3..3....4..4..4....3..2..1....1..1..2
%e ..2..2..3....1..0..1....5..5..4....4..3..2....3..4..3....3..2..2....1..2..2
%e ..2..2..2....1..1..1....5..4..4....4..3..3....4..4..4....2..2..2....2..2..1
%e ..3..2..3....1..1..0....4..4..3....4..3..4....4..3..4....1..1..1....2..1..1
%K nonn
%O 1,1
%A _R. H. Hardin_, Dec 19 2013
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