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%I #6 Dec 18 2015 18:17:45
%S 7,43,519,12259,570911,52683885,9661943973,3529267255201,
%T 2571928557261907,3744070741500225585,10898903552323266521821,
%U 63494356952926436300329797,740796894931520786982829942993
%N Number of lower triangles of an n X n 0..6 array with each element differing from all of its diagonal, vertical, antidiagonal and horizontal neighbors by one or less
%C Column 6 of A195232
%H R. H. Hardin, <a href="/A195230/b195230.txt">Table of n, a(n) for n = 1..15</a>
%e Some solutions for n=4
%e ..6........4........5........4........2........2........3........2
%e ..5.5......4.4......4.5......4.4......2.3......2.2......4.4......1.2
%e ..5.6.5....4.4.3....4.4.4....5.5.5....3.3.3....2.2.2....3.3.3....1.1.1
%e ..6.6.5.4..4.3.3.4..3.4.4.3..5.6.5.6..2.2.2.3..1.2.1.1..3.4.4.3..1.0.1.1
%K nonn
%O 1,1
%A _R. H. Hardin_ Sep 13 2011
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