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%I #7 May 18 2020 19:56:29
%S 1,52,373780,33093356640,14216420563705724,19558496206477343793824,
%T 67939294184937980415465539016,510275358863420934339418249390485008,
%U 7427072102775408021555037479377677353344288,193059270325130351714478780835691676245238854091968
%N Number of n X 6 nonnegative integer arrays with new values 0 upwards introduced in row major order and no element equal to any horizontal or antidiagonal neighbor (colorings ignoring permutations of colors).
%H Andrew Howroyd, <a href="/A208300/b208300.txt">Table of n, a(n) for n = 0..50</a>
%e Some solutions for n=4:
%e ..0..1..0..1..0..1....0..1..0..1..2..1....0..1..0..1..0..1....0..1..0..1..2..1
%e ..0..1..0..1..0..1....0..1..0..1..0..1....0..1..0..1..0..1....0..1..0..3..0..1
%e ..2..1..3..1..0..1....2..1..2..1..0..1....0..1..0..1..0..1....0..1..0..2..3..0
%e ..0..1..0..1..2..0....2..0..2..3..0..1....0..1..0..1..0..1....0..1..0..1..2..0
%Y Column 6 of A208301.
%K nonn
%O 0,2
%A _R. H. Hardin_, Feb 25 2012
%E a(0)=1 prepended and terms a(6) and beyond from _Andrew Howroyd_, May 18 2020
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