A229800 Number of 7X7 0..n arrays with rows and columns in lexicographically nondecreasing order

836488618, 132171590850720635, 122233352821430587249163, 5614157616366023545393324521, 37429493951522536724740382711237, 65195331584280599878464161050608017

Offset

1,1

Comments

Row 7 of A229794

Links

Table of n, a(n) for n=1..6.

Example

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

Crossrefs

Sequence in context: A132216 A091340 A114665 * A182239 A204406 A204141

Adjacent sequences: A229797 A229798 A229799 * A229801 A229802 A229803

Keyword

nonn

Author

R. H. Hardin, Sep 29 2013

Status

approved