|
%I #5 Dec 10 2015 12:33:38
%S 1,0,45,1098,86800,3882992,199692576,10078711072,1696870266800,
%T 145139567193300,13546296060670325,1187049535139072700,
%U 119750974794907122850,11360997964869380793175,1099198326991641651851775
%N Number of nX2 0..n*2-1 arrays with upper left zero and lower right n*2-1 and each element differing from its horizontal and diagonal neighbors by a power of two.
%C Column 2 of A265619.
%H R. H. Hardin, <a href="/A265615/b265615.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=4
%e ..0..1....0..1....0..4....0..2....0..2....0..4....0..2....0..2....0..2....0..4
%e ..3..2....3..4....3..1....6..2....3..1....0..2....3..2....6..2....3..1....4..2
%e ..6..7....3..4....6..5....6..7....5..7....5..1....5..4....6..5....3..2....3..5
%e ..5..7....6..7....6..7....5..7....5..7....6..7....3..7....6..7....6..7....6..7
%Y Cf. A265619.
%K nonn
%O 1,3
%A _R. H. Hardin_, Dec 10 2015
| 