|
%I #8 Dec 30 2023 21:53:37
%S 2,16,211,6837,418876,40316253,8138711727,2968348851593,
%T 1635655868695143,1996781212118762256,4440970754945359464401,
%U 13563038968625915203795793
%N Number of n X n 0..1 arrays avoiding 0 0 0 horizontally and 0 1 1 vertically.
%C Diagonal of A206936.
%e Some solutions for n=4
%e ..1..1..0..1....1..1..1..0....1..1..0..1....1..1..0..1....0..1..1..0
%e ..1..0..0..1....0..0..1..1....0..1..0..1....1..1..0..1....0..0..1..0
%e ..0..0..1..0....1..1..1..0....1..0..0..1....0..1..1..0....0..0..1..1
%e ..0..1..0..1....0..0..1..0....0..1..0..1....0..1..0..0....0..0..1..0
%Y Cf. A206936.
%K nonn
%O 1,1
%A _R. H. Hardin_, Feb 13 2012
| 