A205026 Number of (n+1)X8 0..3 arrays with the determinants of 2X2 subblocks nondecreasing rightwards and downwards.

13615376, 14267356381, 3650380799573, 2691721552273415, 932371404894182926, 566608180773299047113, 235682549037000868908322, 128583965208974345291662172, 58586608357082597713721493080

Offset

1,1

Comments

Column 7 of A205027

Links

R. H. Hardin, Table of n, a(n) for n = 1..21

Example

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

Crossrefs

Sequence in context: A353025 A345609 A346283 * A126724 A251565 A082256

Adjacent sequences: A205023 A205024 A205025 * A205027 A205028 A205029

Keyword

nonn

Author

R. H. Hardin, Jan 21 2012

Status

approved