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A259420 Number of (n+1)X(n+1) 0..1 arrays with each 2X2 subblock having clockwise pattern 0000 0001 0011 or 0111 1

%I

%S 13,243,12953,1990133,873754597,1101527291223,3975872829274865,

%T 41147590225188806309,1220087829652769318601383,

%U 103689338398592714772850061461,25251868912730969096083539641411367

%N Number of (n+1)X(n+1) 0..1 arrays with each 2X2 subblock having clockwise pattern 0000 0001 0011 or 0111

%C Diagonal of A259427

%H R. H. Hardin, <a href="/A259420/b259420.txt">Table of n, a(n) for n = 1..14</a>

%e Some solutions for n=3

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

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

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

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

%Y Cf. A259427

%K nonn

%O 1,1

%A _R. H. Hardin_, Jun 26 2015

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Last modified May 16 21:13 EDT 2022. Contains 353720 sequences. (Running on oeis4.)