A205230 Number of (n+1)X4 0..2 arrays with rows and columns of permanents of all 2X2 subblocks lexicographically nondecreasing, and all 2X2 permanents nonzero

1187, 27157, 640652, 12273323, 221519116, 3408343704, 48815088704, 628179958745, 7601482985625, 85461685481592, 913975093055739, 9268873184287274, 90266141973458345, 844362225976352539

Offset

1,1

Comments

Column 3 of A205235

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Sequence in context: A052236 A342066 A153378 * A229539 A233687 A233640

Adjacent sequences: A205227 A205228 A205229 * A205231 A205232 A205233

Keyword

nonn

Author

R. H. Hardin Jan 24 2012

Status

approved