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Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000000 00000001 or 00001011
1

%I #5 Jul 22 2015 07:41:00

%S 34,85,747,6044,65907,1271212,28517537,866931786,41412466296,

%T 2594607954501,217632708449176,26820265742576644,4556787104721551797,

%U 1048460617788126795330,341811609666627431538479

%N Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000000 00000001 or 00001011

%C Diagonal of A260284

%H R. H. Hardin, <a href="/A260276/b260276.txt">Table of n, a(n) for n = 1..18</a>

%e Some solutions for n=4

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

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

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

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

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

%Y Cf. A260284

%K nonn

%O 1,1

%A _R. H. Hardin_, Jul 22 2015