The OEIS is supported by the many generous donors to the OEIS Foundation.
Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
%I #7 Dec 18 2015 18:18:02
%S 2,16,102,989,15839,454223,22743106,1965912435,292568573966,
%T 74527048580258,32449227184884623,24089588153258657647,
%U 30462508808101945246072,65556106479277551484530086
%N Number of n X n 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 1 and 1 0 0 vertically
%C Diagonal of A207960
%H R. H. Hardin, <a href="/A207955/b207955.txt">Table of n, a(n) for n = 1..17</a>
%e Some solutions for n=4
%e ..1..1..0..0....0..1..1..1....1..1..1..0....0..0..1..1....1..0..0..1
%e ..1..1..0..0....0..1..0..0....0..1..1..0....0..1..1..0....0..0..1..1
%e ..1..1..0..0....0..0..1..1....1..1..1..0....0..1..1..1....1..0..0..1
%e ..0..1..0..0....0..1..0..0....1..1..1..0....0..0..1..1....0..0..1..1
%K nonn
%O 1,1
%A _R. H. Hardin_ Feb 21 2012