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Number of (n+3)X(7+3) 0..3 white square subarrays x(i,j) with each element diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 4, and upper left element zero
2

%I #4 Nov 01 2013 20:19:49

%S 18208,1144652,91616256,6209914254,421312592376,29418861515276,

%T 2042677948725090,141319541518782110,9795693765467658856,

%U 679240997122800513626,47077272279587723130516,3262751175546200573443768

%N Number of (n+3)X(7+3) 0..3 white square subarrays x(i,j) with each element diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 4, and upper left element zero

%C Column 7 of A230949

%H R. H. Hardin, <a href="/A230948/b230948.txt">Table of n, a(n) for n = 1..27</a>

%e Some solutions for n=2

%e ..0..x..2..x..2..x..0..x..0..x....0..x..0..x..0..x..2..x..0..x

%e ..x..1..x..3..x..2..x..1..x..3....x..1..x..1..x..2..x..3..x..1

%e ..2..x..0..x..3..x..0..x..2..x....0..x..2..x..1..x..3..x..2..x

%e ..x..3..x..0..x..2..x..1..x..3....x..3..x..1..x..0..x..2..x..1

%e ..2..x..2..x..1..x..1..x..0..x....2..x..0..x..0..x..1..x..1..x

%K nonn

%O 1,1

%A _R. H. Hardin_, Nov 01 2013