A195229 - OEIS

%I #6 Dec 18 2015 18:17:45

%S 6,36,428,9982,459880,42029278,7640055854,2767861764930,

%T 2001526172413328,2892451174381411040,8361331814456905846790,

%U 48387254396810574882721328,560941284568012233398098984786,13033945031291662448750033149621602

%N Number of lower triangles of an n X n 0..5 array with each element differing from all of its diagonal, vertical, antidiagonal and horizontal neighbors by one or less

%C Column 5 of A195232

%H R. H. Hardin, <a href="/A195229/b195229.txt">Table of n, a(n) for n = 1..15</a>

%e Some solutions for n=4

%e ..0........3........0........4........0........2........2........2

%e ..1.1......4.4......1.0......4.4......1.1......1.1......1.2......3.2

%e ..0.1.0....4.3.3....1.0.1....4.5.5....2.1.1....2.1.1....2.2.2....3.3.2

%e ..1.0.1.0..4.4.3.3..1.1.1.2..4.4.5.5..2.1.1.1..2.1.1.2..3.3.2.1..2.3.2.2

%K nonn

%O 1,1

%A _R. H. Hardin_ Sep 13 2011