login
Number of (n+2)X(7+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000101 00010001 or 00010101
1

%I #4 Jul 29 2015 22:41:36

%S 2246,5418,19069,59758,217376,727342,2707758,8855024,33286034,

%T 110210856,412748296,1357891144,5097313270,16821243128,63055195644,

%U 207867167400,779656269748,2570612995104,9639618875124,31789508626272,119214975682522

%N Number of (n+2)X(7+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000101 00010001 or 00010101

%C Column 7 of A260609

%H R. H. Hardin, <a href="/A260608/b260608.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

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

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

%Y Cf. A260609

%K nonn

%O 1,1

%A _R. H. Hardin_, Jul 29 2015