A206216 Number of (n+1)X(n+1) 0..2 arrays with rows and columns of determinants of all 2X2 subblocks lexicographically nondecreasing

81, 7313, 1782191, 1827047303, 7626209039519, 162241662044855141

Offset

1,1

Comments

Diagonal of A206223

Links

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

Example

Some solutions for n=4
..1..1..0..2..0....2..2..1..1..2....2..2..1..2..0....1..0..0..2..2
..0..0..0..0..0....0..0..0..0..0....2..1..0..0..0....0..0..0..0..0
..0..2..1..2..0....1..0..0..2..1....2..0..1..0..1....2..2..1..0..1
..0..0..0..0..0....0..0..0..1..1....0..0..2..0..2....0..0..0..0..2
..0..0..1..1..0....0..1..0..1..2....0..0..1..0..2....0..0..1..0..2

Crossrefs

Sequence in context: A223553 A185770 A222441 * A205056 A186132 A206504

Adjacent sequences: A206213 A206214 A206215 * A206217 A206218 A206219

Keyword

nonn

Author

R. H. Hardin Feb 04 2012

Status

approved