A212932 Number of 3 X n 0..n-1 arrays with no column j greater than column j-1 in all rows.

1, 63, 18226, 14177855, 23124921876, 68264066143602, 330676305397366860, 2450628904209116751423, 26359630332235218287361280, 394964706663355785627860751188, 7977079877065700492793254299414812

Offset

1,2

Comments

Row 3 of A212930.

Links

R. H. Hardin, Table of n, a(n) for n = 1..16

Example

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

Crossrefs

Cf. A212930.

Sequence in context: A289875 A062208 A132594 * A349902 A177233 A183482

Adjacent sequences: A212929 A212930 A212931 * A212933 A212934 A212935

Keyword

nonn

Author

R. H. Hardin, May 31 2012

Status

approved