A235744 Number of (n+1)X(2+1) 0..3 arrays with the sum of each 2X2 subblock maximum and minimum lexicographically nondecreasing columnwise and nonincreasing rowwise

2982, 103106, 3493283, 102505743, 2937817702, 78357821891, 2048901015407, 51582880207651, 1280585994429075, 31146056902464824, 750829114676769986, 17900362458855209223, 424545394570941211292, 10009989668346734288085

Offset

1,1

Comments

Column 2 of A235747

Links

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

Example

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

Crossrefs

Sequence in context: A289455 A360666 A202775 * A235503 A120373 A365258

Adjacent sequences: A235741 A235742 A235743 * A235745 A235746 A235747

Keyword

nonn

Author

R. H. Hardin, Jan 15 2014

Status

approved