A204793 Number of (n+1)X(n+1) 0..1 arrays with rows and columns of determinants of all 2X2 subblocks lexicographically nondecreasing

16, 240, 6537, 422426, 60519533, 20321241222, 15605413576718, 27766411206607643, 112893571720052223367, 1058197232959093882740859

Offset

1,1

Comments

Diagonal of A204800

Links

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

Example

Some solutions for n=4
..1..0..1..0..1....1..1..1..1..1....1..0..0..1..0....1..1..1..0..1
..0..0..1..0..1....0..0..0..0..0....0..0..0..0..0....1..0..0..0..1
..1..0..0..0..1....1..1..1..0..1....1..0..0..1..0....0..0..1..0..1
..0..0..1..0..1....1..1..1..0..0....1..0..0..1..1....1..0..0..0..0
..0..0..0..0..0....0..0..0..0..0....1..0..0..0..1....1..0..0..1..0

Crossrefs

Sequence in context: A170735 A058667 A005619 * A173605 A175720 A342031

Adjacent sequences: A204790 A204791 A204792 * A204794 A204795 A204796

Keyword

nonn

Author

R. H. Hardin Jan 19 2012

Status

approved