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

Author

R. H. Hardin Apr 05 2013

Keywords

• nonn

Comments

Column 5 of A224374

Examples

			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
		

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