A207295 Number of (n+1)X(n+1) 0..3 arrays with rows and columns of determinants of all 2X2 subblocks lexicographically nondecreasing

256, 93991, 158967751, 1951282415919, 189688562729242206

Offset

1,1

Comments

Diagonal of A207300

Links

Table of n, a(n) for n=1..5.

Example

Some solutions for n=4
..1..0..0..0..0....3..2..3..3..3....3..1..3..0..1....0..2..0..1..0
..3..0..1..3..1....0..0..0..0..0....2..0..0..0..0....2..0..0..3..2
..3..0..1..3..1....2..2..2..2..3....1..0..0..0..2....2..0..0..3..1
..1..0..0..0..0....1..1..1..1..2....0..0..1..0..3....2..2..0..1..0
..1..0..2..2..0....0..0..0..3..2....3..0..1..0..1....0..2..0..2..0

Crossrefs

Sequence in context: A222101 A264347 A223199 * A205927 A223354 A236941

Adjacent sequences: A207292 A207293 A207294 * A207296 A207297 A207298

Keyword

nonn

Author

R. H. Hardin Feb 16 2012

Status

approved