A265618 - OEIS

A265618

Number of nX5 0..n*5-1 arrays with upper left zero and lower right n*5-1 and each element differing from its horizontal and diagonal neighbors by a power of two.

%I #4 Dec 10 2015 12:35:42

%S 16,29296,13534874,41288839953,1819521260530360,2227848096385852333,

%T 18522579416634839942860,96865983719407432495395322,

%U 932935228224041585869551598574,5955054040041096909506231404368755

%N Number of nX5 0..n*5-1 arrays with upper left zero and lower right n*5-1 and each element differing from its horizontal and diagonal neighbors by a power of two.

%C Column 5 of A265619.

%H R. H. Hardin, <a href="/A265618/b265618.txt">Table of n, a(n) for n = 1..12</a>

%e Some solutions for n=2

%e ..0..1..5..1..5....0..2..3..1..3....0..1..5..1..0....0..2..3..1..9

%e ..9..1..9..7..9....3..1..3..1..9....6..2..3..7..9....5..4..3..5..9

%Y Cf. A265619.

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 10 2015