%I
%S 1,1,10,1744,7122884,932561028624
%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, vertical, diagonal or antidiagonal neighbor
%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 ..3.0.4....0.3.4....3.0.1....3.4.3....0.3.4....3.4.5....3.0.1....0.3.1
%e ..5.1.2.5..5.6.2.0..2.4.3.5..2.0.2.1..1.5.2.5..0.6.7.0..4.5.6.2..4.5.2.5
%K nonn
%O 1,3
%A _R. H. Hardin_ Apr 24 2012
