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A265488 Number of (3n-2)X2 0..6n-5 arrays with upper left zero and lower right 6n-5 and each element differing from its horizontal, vertical and diagonal neighbors by a power of two. 1

%I

%S 1,12,1030,298764,83948008,22511356876,10087240306899,

%T 3527678938392395,1384849739444093464,509526476766763110063,

%U 197694082692466208850553,132949897804861666617140704,58944850608913545191419115404

%N Number of (3n-2)X2 0..6n-5 arrays with upper left zero and lower right 6n-5 and each element differing from its horizontal, vertical and diagonal neighbors by a power of two.

%C Column 2 of A265494 (terms of the form 3n-2).

%H R. H. Hardin, <a href="/A265488/b265488.txt">Table of n, a(n) for n = 1..70</a>

%e Some solutions for n=2

%e ..0..1....0..4....0..1....0..1....0..4....0..4....0..4....0..1....0..4....0..4

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

%e ..5..3....5..6....5..3....5..3....5..3....5..3....5..6....5..6....5..3....5..3

%e ..3..7....3..7....6..7....6..7....6..7....3..7....6..7....3..7....3..7....6..7

%Y Cf. A265494.

%K nonn

%O 1,2

%A _R. H. Hardin_, Dec 09 2015

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Last modified May 27 15:36 EDT 2022. Contains 354105 sequences. (Running on oeis4.)