A224387 Number of nX4 0..3 arrays with diagonals and antidiagonals unimodal and rows nondecreasing

35, 1225, 27790, 497958, 8573507, 152271025, 2780848289, 51325449985, 949582166068, 17572045403455, 325249748226217, 6022221071267123, 111533443784218247, 2065901802649317374, 38268294526698715055

Offset

1,1

Comments

Column 4 of A224391

Links

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

R. H. Hardin, Empirical recurrence of order 47

Formula

Empirical recurrence of order 47 (see link above)

Example

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

Crossrefs

Sequence in context: A223867 A095153 A223989 * A224020 A009979 A238379

Adjacent sequences: A224384 A224385 A224386 * A224388 A224389 A224390

Keyword

nonn

Author

R. H. Hardin Apr 05 2013

Status

approved