A224200 Number of nX4 0..3 arrays with rows unimodal and antidiagonals nondecreasing

130, 4580, 108625, 2411246, 54177872, 1229044416, 27957232796, 636184842092, 14476260508500, 329391607167600, 7494853316529036, 170534677669656388, 3880272541450452972, 88290059453259690888, 2008914306032132754800

Offset

1,1

Comments

Column 4 of A224204

Links

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

Formula

Empirical: a(n) = 35*a(n-1) -347*a(n-2) +1689*a(n-3) -2986*a(n-4) -2311*a(n-5) +23532*a(n-6) -23864*a(n-7) -36468*a(n-8) +100464*a(n-9) +94080*a(n-10) for n>12

Example

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

Crossrefs

Sequence in context: A224060 A224046 A224277 * A333900 A224122 A223808

Adjacent sequences: A224197 A224198 A224199 * A224201 A224202 A224203

Keyword

nonn

Author

R. H. Hardin Apr 01 2013

Status

approved