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%I #4 Dec 18 2015 18:18:10
%S 0,0,34,1651,39901,480914,3668669,20431909,90528036,337143876,
%T 1095367909,3187460809
%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 element at a city block distance of two, and containing the value n(n+1)/2-4
%C Column 3 of A212036
%e Some solutions for n=4
%e ..0........0........0........0........0........0........0........0
%e ..1.2......1.2......1.2......0.1......1.2......1.2......1.2......1.2
%e ..3.4.5....3.4.5....3.4.5....2.1.0....1.3.3....3.2.0....3.4.5....3.4.0
%e ..2.0.6.7..6.7.7.2..6.0.5.4..3.4.5.6..4.0.5.6..4.5.3.6..6.0.2.7..2.5.6.3
%K nonn
%O 1,3
%A _R. H. Hardin_ Apr 27 2012
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