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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 0
2, 3, 19, 121, 7148, 326650, 175765510, 74872992399, 400292326222730, 1748923742658486631 (list; graph; refs; listen; history; text; internal format)
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: A141508 A119344 A072877 * A241350 A032329 A219285

Adjacent sequences:  A201375 A201376 A201377 * A201379 A201380 A201381

KEYWORD

nonn

AUTHOR

R. H. Hardin Nov 30 2011

STATUS

approved

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Last modified November 29 06:32 EST 2021. Contains 349416 sequences. (Running on oeis4.)