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%I #4 Dec 18 2015 18:18:08
%S 0,0,41,2385,55822,637721,4639742,24871596,106911695,388681117,
%T 1238600816,3548005682,9306274551
%N Number of lower triangular n X n arrays colored with integers 0 upwards introduced in row major order, with no element equal to any horizontal or vertical neighbor, and containing the value n(n+1)/2-4
%C Column 3 of A211910
%e Some solutions for n=4
%e ..0........0........0........0........0........0........0........0
%e ..1.2......1.2......1.0......1.2......1.2......1.0......1.2......1.0
%e ..3.4.5....0.3.2....2.3.4....3.4.2....3.4.3....2.3.4....3.1.4....2.1.3
%e ..6.3.0.6..4.5.3.6..1.0.5.6..0.3.5.6..4.5.2.6..5.2.6.5..5.6.3.4..1.4.5.6
%K nonn
%O 1,3
%A _R. H. Hardin_ Apr 25 2012
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