A223813 Number of nX4 0..2 arrays with row sums nondecreasing and column sums unimodal

46, 1922, 65465, 1941904, 52310070, 1313561156, 31302500115, 716436867795, 15887478421991, 343524128791643, 7277651757377395, 151618311154271042, 3115328781386015762, 63276105450145436904, 1272818850579941619368

Offset

1,1

Comments

Column 4 of A223815

Links

R. H. Hardin, Table of n, a(n) for n = 1..19

Example

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

Crossrefs

Sequence in context: A263190 A364119 A331707 * A324451 A162889 A163232

Adjacent sequences: A223810 A223811 A223812 * A223814 A223815 A223816

Keyword

nonn

Author

R. H. Hardin Mar 27 2013

Status

approved