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 #5 Mar 31 2012 12:36:02
%S 31,1489,154561,80761059,96865190255,525819969687473,
%T 7163899183570889649,401495654334865659721795,
%U 61022067811287778788163474527,35442207739725827931704064596045201
%N Number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock singular
%C Diagonal of A185521
%e Some solutions for 3X3
%e ..0..1..1....0..0..2....2..1..2....1..0..1....0..0..2....1..0..2....1..0..0
%e ..0..0..0....2..0..2....0..0..0....0..0..1....1..0..2....2..0..0....2..0..2
%e ..2..2..1....2..0..0....0..2..0....1..0..0....1..0..0....2..0..1....2..0..1
%K nonn
%O 1,1
%A _R. H. Hardin_ Jan 29 2011