login
A206335
Number of (n+1)X(n+1) 0..3 arrays with every 2X2 subblock having nonzero determinant and commuting with every horizontal or vertical neighbor
1
192, 181, 1340, 1581, 12021, 14181, 108141, 127581, 973221, 1148181, 8758941, 10333581, 78830421, 93002181, 709473741, 837019581, 6385263621, 7533176181, 57467372541, 67798585581, 517206352821, 610187270181, 4654857175341
OFFSET
1,1
COMMENTS
Diagonal of A206343
LINKS
EXAMPLE
Some solutions for n=4
..1..0..2..0..2....0..1..0..1..0....1..2..0..2..0....3..3..0..1..0
..0..1..0..2..0....1..0..1..0..1....2..0..2..0..2....1..0..3..0..1
..1..0..1..0..2....0..1..0..1..0....0..2..0..2..0....0..1..0..3..0
..0..1..0..1..0....3..0..1..0..1....1..0..2..0..2....1..0..1..0..3
..1..0..1..0..1....0..3..0..1..3....0..1..0..2..0....0..1..0..1..3
CROSSREFS
Sequence in context: A187698 A206343 A206336 * A289219 A190892 A039667
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 06 2012
STATUS
approved