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A259634 Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000000 or 00000001 1

%I

%S 18,64,581,4146,44500,899557,19848497,593505391,28804661988,

%T 1803294030851,150215435682396,18581117366931470,3161106877662837437,

%U 725638805668965032687,236686439674936087627391

%N Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000000 or 00000001

%C Diagonal of A259642

%H R. H. Hardin, <a href="/A259634/b259634.txt">Table of n, a(n) for n = 1..18</a>

%e Some solutions for n=4

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

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

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

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

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

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

%Y Cf. A259642

%K nonn

%O 1,1

%A _R. H. Hardin_, Jul 02 2015

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Last modified September 27 22:36 EDT 2020. Contains 337388 sequences. (Running on oeis4.)