A187522 Number of 3X3 0..n arrays with the array of 2X2 subblock determinants antisymmetric and no off-diagonal 2X2 subblock determinant zero

6, 98, 450, 1590, 3426, 8546, 13992, 26158, 41748, 67588, 90082, 148792, 187474, 260222, 355100, 480620, 569610, 778354, 903974, 1192760, 1466488, 1766846, 1994060, 2603040, 2993262, 3493594, 4070056, 4892770, 5366122, 6633208, 7221322

Offset

1,1

Comments

Row 2 of A187521

Links

R. H. Hardin, Table of n, a(n) for n = 1..53

Example

Some solutions for 3X3
..0..0..3....2..2..2....2..1..2....3..3..3....0..3..2....2..3..2....1..1..1
..3..3..2....1..1..2....2..1..1....3..3..1....0..2..2....2..3..0....2..2..0
..0..3..2....3..1..2....3..2..2....1..3..1....1..1..1....0..3..0....0..1..0

Crossrefs

Sequence in context: A064753 A322739 A244251 * A224615 A138913 A360336

Adjacent sequences: A187519 A187520 A187521 * A187523 A187524 A187525

Keyword

nonn

Author

R. H. Hardin Mar 10 2011

Status

approved