A206221 Number of (n+1)X7 0..2 arrays with rows and columns of determinants of all 2X2 subblocks lexicographically nondecreasing

139390, 53835891, 9098547899, 2537225006229, 656654900321262, 162241662044855141, 33632275642926148580, 5657294413089823562871

Offset

1,1

Comments

Column 6 of A206223

Links

Table of n, a(n) for n=1..8.

Example

Some solutions for n=4
..2..0..0..1..2..2..2....2..2..0..0..1..2..1....2..0..0..2..2..2..1
..1..0..0..0..0..0..0....2..0..0..0..1..2..1....1..0..0..2..2..2..1
..1..0..1..2..0..2..1....1..0..2..0..1..2..1....2..0..0..1..1..2..2
..1..0..1..2..0..0..0....1..0..1..0..1..2..1....1..0..0..1..2..0..2
..0..0..1..2..0..2..0....1..2..2..0..1..2..1....2..0..0..0..1..2..2

Crossrefs

Sequence in context: A145207 A236745 A205213 * A028518 A206748 A018234

Adjacent sequences: A206218 A206219 A206220 * A206222 A206223 A206224

Keyword

nonn

Author

R. H. Hardin Feb 04 2012

Status

approved