A233309 Number of (n+1)X(1+1) 0..4 arrays with row and column sums nondecreasing, and no adjacent elements equal.

92, 463, 2311, 9822, 41192, 160280, 617500, 2278154, 8346612, 29720846, 105322406, 365709441, 1265566649, 4312665297, 14661080626, 49240073950, 165092049733, 548097358680, 1817406550199, 5977145363030, 19640272703424, 64090628827653

Offset

1,1

Comments

Column 1 of A233311

Links

R. H. Hardin, Table of n, a(n) for n = 1..115

Example

Some solutions for n=5
..1..4....1..0....0..1....1..0....0..2....4..0....1..2....1..2....0..1....2..1
..3..2....0..2....1..0....2..1....3..0....1..3....2..1....0..3....3..2....0..4
..1..4....2..1....0..3....0..3....0..4....0..4....1..4....4..0....2..3....1..3
..4..1....0..3....2..1....3..1....3..1....4..1....4..1....1..3....3..2....0..4
..1..4....1..2....1..3....0..4....4..3....3..2....1..4....2..4....1..4....1..3
..4..2....2..1....0..4....1..3....3..4....2..4....4..1....4..2....2..3....3..2

Crossrefs

Sequence in context: A100169 A100170 A233311 * A205992 A200425 A107343

Adjacent sequences: A233306 A233307 A233308 * A233310 A233311 A233312

Keyword

nonn

Author

R. H. Hardin, Dec 07 2013

Status

approved