A268205 Number of 1Xn 0..n arrays with every repeated value in every row and column greater than the previous repeated value.

2, 9, 60, 570, 6960, 104006, 1837752, 37478718, 866361210, 22384298772, 639235846656, 19993319047663, 679693673292816, 24954856965472485, 984056034148827632, 41479800266522142954, 1861205533117885580022

Offset

1,1

Comments

Row 1 of A268204.

Links

R. H. Hardin, Table of n, a(n) for n = 1..193

Example

Some solutions for n=6
..4..1..5..1..3..3....4..2..6..4..4..0....5..0..0..6..5..0....3..1..2..6..1..3

Crossrefs

Cf. A268204.

Sequence in context: A269634 A269530 A269672 * A269600 A269460 A207649

Adjacent sequences: A268202 A268203 A268204 * A268206 A268207 A268208

Keyword

nonn

Author

R. H. Hardin, Jan 28 2016

Status

approved