A235439 Number of (n+1)X(3+1) 0..2 arrays with 2X2 subblock sums lexicographically nondecreasing rowwise and nonincreasing columnwise

2500, 65497, 1762344, 37115629, 785712765, 13504013024, 235332193767, 3433774399772, 50886532849316, 647263611376214, 8360593933795473, 94543450237472909, 1085137138664791739, 11076999555060193403

Offset

1,1

Comments

Column 3 of A235441

Links

R. H. Hardin, Table of n, a(n) for n = 1..147

Example

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

Crossrefs

Sequence in context: A253370 A204225 A251115 * A235404 A120408 A031778

Adjacent sequences: A235436 A235437 A235438 * A235440 A235441 A235442

Keyword

nonn

Author

R. H. Hardin, Jan 10 2014

Status

approved