A278804 Number of n X 5 0..2 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order.

21, 336, 5767, 110455, 2179956, 41299256, 725674326, 11698232451, 172994405326, 2356249442222, 29713542257399, 348752692539813, 3828597575581476, 39486426123589674, 384123325152744838, 3537191225894230125

Offset: 1

Author

R. H. Hardin, Nov 28 2016

Keywords

• nonn

Comments

Column 5 of A278807.

Examples

			Some solutions for n=4
..1..1..1..1..0. .1..1..0..0..0. .1..1..0..0..0. .1..1..0..0..0
..2..1..1..0..0. .1..1..1..0..0. .1..1..1..1..0. .1..1..1..1..0
..2..2..0..1..2. .1..1..2..2..2. .2..0..1..0..1. .1..1..2..1..2
..2..2..1..1..2. .2..1..1..2..2. .2..0..1..0..2. .2..1..1..1..0
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..109

Crossrefs

Cf. A278807.