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%I #6 Apr 21 2024 22:27:58
%S 1,0,64,559,10444,154825,2325672,32134921,1147830996,27155305770,
%T 705652093502,13954523202055,385113044700852,8391065973567203,
%U 193546379545559324,4212282964238008204,146184585283154036226
%N Number of 2 X n 0..2*n-1 arrays with upper left zero and lower right 2*n-1 and each element differing from its horizontal, diagonal and antidiagonal neighbors by a power of two.
%C Row 2 of A265635.
%H R. H. Hardin, <a href="/A265636/b265636.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=4
%e ..0..4..5..7....0..1..5..1....0..4..3..1....0..4..5..4....0..4..6..7
%e ..2..1..3..7....2..4..3..7....0..4..5..7....6..4..5..7....3..2..3..7
%Y Cf. A265635.
%K nonn,changed
%O 1,3
%A _R. H. Hardin_, Dec 11 2015
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