A235418 Number of (n+1)X(2+1) 0..2 arrays with 2X2 subblock sum of squares lexicographically nondecreasing rowwise and nonincreasing columnwise

432, 5022, 60231, 533868, 4740889, 33788761, 241566875, 1459008798, 8848965583, 46891736689, 249575149293, 1188461312849, 5682088960329, 24740156703465, 108084980986187, 435986901071266, 1763432694210089, 6658246691642318

Offset

1,1

Comments

Column 2 of A235421

Links

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

Example

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

Crossrefs

Sequence in context: A248460 A234327 A174717 * A235422 A234405 A234400

Adjacent sequences: A235415 A235416 A235417 * A235419 A235420 A235421

Keyword

nonn

Author

R. H. Hardin, Jan 10 2014

Status

approved