A253377 Number of (3+1)X(n+1) 0..2 arrays with every 2X2 subblock sum nondecreasing horizontally, vertically and antidiagonally ne-to-sw

2500, 22631, 219438, 2000385, 17316309, 128407497, 912012350, 5602735678, 33436453693, 176885943216, 917401073689, 4314850614208, 20011936293206, 85743645410236, 363685859775159, 1446109155724143, 5708063204873431

Offset

1,1

Comments

Row 3 of A253375

Links

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

Example

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

Crossrefs

Sequence in context: A307764 A062120 A220025 * A253370 A204225 A251115

Adjacent sequences: A253374 A253375 A253376 * A253378 A253379 A253380

Keyword

nonn

Author

R. H. Hardin, Dec 30 2014

Status

approved