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%I #9 Jun 26 2017 01:28:04
%S 1,5,52,8460,908408,1590366402,621070325112,3815473909467500,
%T 3338879032079931702,49279739016010612438482,
%U 78078252717220869748888110,2271020746204851403136701359870,5766825640795432616276139021743234,292268929366529401852293167022121562170
%N Number of horizontal, vertical, diagonal and antidiagonal neighbor colorings of the even squares of an n X 7 array with new integer colors introduced in row major order.
%H Andrew Howroyd, <a href="/A215846/b215846.txt">Table of n, a(n) for n = 0..50</a>
%e Some solutions for n=3:
%e ..0..x..1..x..2..x..3....0..x..1..x..2..x..3....0..x..1..x..2..x..3
%e ..x..3..x..4..x..5..x....x..2..x..4..x..5..x....x..4..x..0..x..5..x
%e ..1..x..2..x..0..x..1....6..x..7..x..0..x..6....3..x..5..x..6..x..4
%Y Column 7 of A215847.
%K nonn
%O 0,2
%A _R. H. Hardin_, Aug 24 2012
%E a(0)=1 prepended and terms a(7) and beyond from _Andrew Howroyd_, Jun 26 2017
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