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%I #9 Mar 12 2023 14:16:02
%S 203,7817980,846047363854,96356630422085931,10996875674843226590993,
%T 1255145613308486512244031328,143258513960209594417739070314380,
%U 16351094722174331189725220168411285754,1866264648662016827992654208819869556160352
%N Number of n X 7 0..6 arrays with values 0..6 introduced in row major order and no element equal to any horizontal or vertical neighbor.
%H Andrew Howroyd, <a href="/A198722/b198722.txt">Table of n, a(n) for n = 1..200</a>
%e Some solutions with all values 0 to 6 for n=3:
%e 0 1 0 2 3 4 5 0 1 0 2 1 3 0 0 1 0 2 0 1 3
%e 1 0 1 0 2 6 4 1 0 1 0 4 0 2 1 0 1 0 4 5 1
%e 0 1 0 3 6 0 2 0 1 0 3 5 3 6 0 1 0 3 6 1 2
%Y Column 7 of A198723.
%K nonn
%O 1,1
%A _R. H. Hardin_, Oct 29 2011
%E Terms a(7) and beyond from _Andrew Howroyd_, Mar 12 2023
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