login
A224127
Number of n X n 0..1 arrays with rows nondecreasing and antidiagonals unimodal.
1
2, 9, 58, 419, 3149, 24095, 186348, 1452236, 11385356, 89697284, 709549769, 5632222541, 44837998135, 357848802839, 2862135963926, 22934807116783, 184082328044394, 1479641153930348, 11908495546392890, 95951907989239148
OFFSET
1,1
COMMENTS
Diagonal of A224133.
LINKS
EXAMPLE
Some solutions for n=3:
..0..1..1....0..0..0....0..1..1....0..0..1....1..1..1....0..0..1....0..0..1
..0..1..1....0..0..0....1..1..1....0..0..1....0..0..1....0..1..1....0..0..0
..0..1..1....0..1..1....0..1..1....0..0..1....0..1..1....0..0..1....0..1..1
CROSSREFS
Cf. A224133.
Sequence in context: A141787 A047852 A240881 * A366401 A116867 A168358
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 31 2013
STATUS
approved