A201378 Number of n X n 0..1 arrays with rows and columns lexicographically nondecreasing and the instance counts of every value within one of each other

2, 3, 19, 121, 7148, 326650, 175765510, 74872992399, 400292326222730, 1748923742658486631

Offset

1,1

Comments

Diagonal of A201384

Links

Table of n, a(n) for n=1..10.

Example

Some solutions for n=5
..0..0..0..0..1....0..0..0..1..1....0..0..0..1..1....0..0..0..0..0
..0..0..1..1..0....0..0..0..1..1....0..0..1..0..0....0..1..1..1..1
..0..1..1..1..0....0..0..1..0..1....0..1..0..0..0....1..0..0..0..1
..1..0..0..1..1....0..1..1..0..1....0..1..1..0..1....1..0..0..0..1
..1..0..1..1..0....1..0..0..1..1....1..1..1..1..1....1..0..1..1..1

Crossrefs

Sequence in context: A366357 A119344 A072877 * A241350 A032329 A219285

Adjacent sequences: A201375 A201376 A201377 * A201379 A201380 A201381

Keyword

nonn

Author

R. H. Hardin Nov 30 2011

Status

approved