%I #4 Dec 18 2015 18:18:10
%S 0,0,5,447,94131,5054845,109065807,1339229741,11235618109
%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)/2-5
%C Column 4 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....3.0.4....3.4.0....3.0.4....3.4.5....3.4.5....3.0.4....3.4.5
%e ..0.5.3.4..5.1.2.5..5.6.3.5..5.6.7.5..5.0.6.2..2.1.0.2..5.1.6.2..6.7.2.1
%K nonn
%O 1,3
%A _R. H. Hardin_ Apr 28 2012