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A265173 Number of nX1 0..n*1-1 arrays with upper left zero and lower right n*1-1 and each element differing from its horizontal and vertical neighbors by a power of two. 6

%I #6 Dec 03 2015 12:16:15

%S 1,1,1,2,16,79,456,2194,20801,142675,1104671,7604426,61694634,

%T 451816635,3436067731,25239520503,319613046628,3036006671645,

%U 30933754595164,285945150234342,3026592170353007,28992125588332051,285889488934911134

%N Number of nX1 0..n*1-1 arrays with upper left zero and lower right n*1-1 and each element differing from its horizontal and vertical neighbors by a power of two.

%C Column 1 of A265178.

%H R. H. Hardin, <a href="/A265173/b265173.txt">Table of n, a(n) for n = 1..210</a>

%e All solutions for n=5

%e ..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0

%e ..1....4....2....2....1....2....1....4....2....2....2....4....4....1....2....2

%e ..0....2....1....1....2....4....2....3....1....0....4....2....0....3....4....3

%e ..2....3....0....3....0....3....3....2....2....2....2....0....2....2....0....2

%e ..4....4....4....4....4....4....4....4....4....4....4....4....4....4....4....4

%Y Cf. A265178.

%K nonn

%O 1,4

%A _R. H. Hardin_, Dec 03 2015

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Last modified June 13 17:32 EDT 2024. Contains 373391 sequences. (Running on oeis4.)