|
%I #4 Jul 23 2015 13:13:33
%S 2880,4438,13632,32488,37948,98032,265120,390138,774416,2085610,
%T 3676672,6576428,16343884,32624460,57557052,130763122,277382484,
%U 506936080,1070477816,2319259576,4413899664,8938596854,19280847812,38024306356
%N Number of (n+2)X(7+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00001111
%C Column 7 of A260370
%H R. H. Hardin, <a href="/A260369/b260369.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=4
%e ..1..1..1..0..0..1..1..0..0....0..0..1..1..1..1..1..1..1
%e ..0..0..1..0..0..0..0..0..0....0..0..0..0..1..1..0..0..1
%e ..0..0..0..0..0..0..0..0..0....0..0..0..0..0..0..0..0..0
%e ..0..0..0..0..0..1..0..0..1....0..1..0..0..0..0..0..0..0
%e ..0..0..1..0..0..1..0..0..1....0..1..0..0..1..1..0..0..1
%e ..0..0..1..0..0..0..0..0..0....0..0..0..0..0..0..0..0..0
%Y Cf. A260370
%K nonn
%O 1,1
%A _R. H. Hardin_, Jul 23 2015
| 