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A265491 Number of (3n-2)X5 0..15n-11 arrays with upper left zero and lower right 15n-11 and each element differing from its horizontal, vertical and diagonal neighbors by a power of two. 1

%I #4 Dec 09 2015 13:51:30

%S 16,0,949287922,1252731688676,34672286157546211045,

%T 34196998281381835852332,68224345875172740226237806550,

%U 945856026152994039469803835728611

%N Number of (3n-2)X5 0..15n-11 arrays with upper left zero and lower right 15n-11 and each element differing from its horizontal, vertical and diagonal neighbors by a power of two.

%C Column 5 of A265494 (terms of the form 3n-2).

%H R. H. Hardin, <a href="/A265491/b265491.txt">Table of n, a(n) for n = 1..12</a>

%e Some solutions for n=1

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

%Y Cf. A265494.

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 09 2015

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Last modified April 25 01:06 EDT 2024. Contains 371964 sequences. (Running on oeis4.)