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A224387 Number of nX4 0..3 arrays with diagonals and antidiagonals unimodal and rows nondecreasing 1
35, 1225, 27790, 497958, 8573507, 152271025, 2780848289, 51325449985, 949582166068, 17572045403455, 325249748226217, 6022221071267123, 111533443784218247, 2065901802649317374, 38268294526698715055 (list; graph; refs; listen; history; text; internal format)
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

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Last modified January 18 13:30 EST 2020. Contains 331007 sequences. (Running on oeis4.)