A224371 Number of nX5 0..2 arrays with rows unimodal and antidiagonals nondecreasing

86, 1915, 26314, 311367, 3607078, 42132769, 495660330, 5848449149, 69064897862, 815702088065, 9633856474182, 113778532335717, 1343744395119438, 15869813554422065, 187424656004529134, 2213510515188443829

Offset

1,1

Comments

Column 5 of A224374

Links

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

Formula

Empirical: a(n) = 21*a(n-1) -141*a(n-2) +427*a(n-3) -546*a(n-4) +526*a(n-5) -2124*a(n-6) +3302*a(n-7) +2396*a(n-8) +7504*a(n-9) +580*a(n-10) +1632*a(n-11) for n>13

Example

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

Crossrefs

Sequence in context: A223930 A224054 A224307 * A055534 A230783 A017802

Adjacent sequences: A224368 A224369 A224370 * A224372 A224373 A224374

Keyword

nonn

Author

R. H. Hardin Apr 05 2013

Status

approved