A224124 Number of 2Xn 0..3 arrays with row sums nondecreasing and column sums unimodal

10, 150, 1747, 16782, 140210, 1050460, 7227405, 46371039, 281020959, 1623035066, 9002891450, 48234712165, 250875276249, 1271548675730, 6302249244967, 30627310088497, 146302624587552, 688283767932118, 3194839035650041

Offset

1,1

Comments

Row 2 of A224123

Links

R. H. Hardin, Table of n, a(n) for n = 1..72

Example

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

Crossrefs

Sequence in context: A212471 A157867 A116156 * A212472 A025750 A365622

Adjacent sequences: A224121 A224122 A224123 * A224125 A224126 A224127

Keyword

nonn

Author

R. H. Hardin Mar 31 2013

Status

approved