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%I #6 Dec 18 2015 18:17:44
%S 6,44,728,26316,2089736,364130672,139323386328,117075649276412,
%T 216113470259526948,876452156097264185188,7810016810149997712089700,
%U 152927733637636192107728580088,6580461097392848372314889891440304
%N Number of lower triangles of an n X n 0..5 array with no element differing from any of its horizontal or vertical neighbors by more than one
%C Column 5 of A194931
%H R. H. Hardin, <a href="/A194928/b194928.txt">Table of n, a(n) for n = 1..16</a>
%e Some solutions for 4X4
%e ..3........2........1........4........5........4........3........2
%e ..4.4......1.2......2.1......3.2......4.4......5.4......4.3......1.1
%e ..4.3.2....1.1.0....3.2.2....3.2.3....5.5.5....4.3.3....3.3.2....0.1.0
%e ..3.2.1.1..1.0.0.0..2.1.1.1..3.3.3.2..4.4.4.3..4.3.4.5..4.3.3.4..1.0.0.0
%K nonn
%O 1,1
%A _R. H. Hardin_ Sep 05 2011
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