A205025 Number of (n+1)X7 0..3 arrays with the determinants of 2X2 subblocks nondecreasing rightwards and downwards

2470216, 888172440, 139786868632, 42501311863619, 8486771114466915, 2391551925319245318, 566608180773299047113, 155382071318023786051201, 40101253859407159274129669, 10933319692657383714277445869

Offset

1,1

Comments

Column 6 of A205027

Links

R. H. Hardin, Table of n, a(n) for n = 1..104

Example

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

Crossrefs

Sequence in context: A257188 A254988 A097968 * A254774 A254781 A254727

Adjacent sequences: A205022 A205023 A205024 * A205026 A205027 A205028

Keyword

nonn

Author

R. H. Hardin Jan 21 2012

Status

approved