A235259 Number of (n+1)X(2+1) 0..3 arrays with 2X2 subblock sums lexicographically nondecreasing columnwise and rowwise.

2400, 75744, 2691067, 64470056, 1538378437, 27988093692, 507441199620, 7534804140934, 111681101728373, 1415861956568375, 17929576294589042, 199950651421904706, 2227935030929519936, 22325110214811735679

Offset

1,1

Comments

Column 2 of A235261

Links

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

Example

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

Crossrefs

Sequence in context: A236084 A204304 A235414 * A321638 A005073 A176767

Adjacent sequences: A235256 A235257 A235258 * A235260 A235261 A235262

Keyword

nonn

Author

R. H. Hardin, Jan 05 2014

Status

approved