login
Number of 3X3 0..n arrays with the array of 2X2 subblock determinants antisymmetric and no off-diagonal 2X2 subblock determinant zero
1

%I #5 Mar 31 2012 12:36:08

%S 6,98,450,1590,3426,8546,13992,26158,41748,67588,90082,148792,187474,

%T 260222,355100,480620,569610,778354,903974,1192760,1466488,1766846,

%U 1994060,2603040,2993262,3493594,4070056,4892770,5366122,6633208,7221322

%N Number of 3X3 0..n arrays with the array of 2X2 subblock determinants antisymmetric and no off-diagonal 2X2 subblock determinant zero

%C Row 2 of A187521

%H R. H. Hardin, <a href="/A187522/b187522.txt">Table of n, a(n) for n = 1..53</a>

%e Some solutions for 3X3

%e ..0..0..3....2..2..2....2..1..2....3..3..3....0..3..2....2..3..2....1..1..1

%e ..3..3..2....1..1..2....2..1..1....3..3..1....0..2..2....2..3..0....2..2..0

%e ..0..3..2....3..1..2....3..2..2....1..3..1....1..1..1....0..3..0....0..1..0

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 10 2011