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%I #4 Dec 18 2015 18:18:10
%S 0,0,5,463,339764,65635205,3564578765,89579748909
%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 within a city block distance of two, and containing the value n(n+1)/2-6
%C Column 5 of A212044
%e Some solutions for n=4
%e ..0........0........0........0........0........0........0........0
%e ..1.2......1.2......1.2......1.2......1.2......1.2......1.2......1.2
%e ..3.4.0....3.4.5....3.4.1....3.0.1....3.4.5....3.4.1....3.4.5....3.4.5
%e ..0.5.6.2..5.6.7.8..5.0.3.6..2.4.5.0..2.6.0.4..5.6.3.5..0.6.3.4..6.0.7.3
%K nonn
%O 1,3
%A _R. H. Hardin_ Apr 28 2012
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