login

Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.

Number of (n+1)X(n+1) 0..2 arrays with the permanents of all 2X2 subblocks equal and nonzero
0

%I #5 Mar 31 2012 12:37:03

%S 56,524,7070,247108,11643054,1289881302,204749436552,73036201343336,

%T 38899944310300258,45302488265102707276,80802524916380070655310

%N Number of (n+1)X(n+1) 0..2 arrays with the permanents of all 2X2 subblocks equal and nonzero

%C Diagonal of A204840

%e Some solutions for n=4

%e ..1..0..1..2..1....0..2..1..2..1....2..2..2..1..0....2..1..0..1..2

%e ..2..2..0..2..0....1..2..0..2..0....0..1..0..1..2....1..0..1..0..1

%e ..0..1..1..1..1....0..2..1..2..1....2..0..2..0..2....1..1..2..1..0

%e ..2..2..0..2..0....1..2..0..2..0....1..1..1..1..0....1..0..1..0..1

%e ..1..0..1..1..1....1..0..1..2..1....1..1..1..1..2....1..1..2..1..2

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 19 2012