A204955 Number of (n+1)X(n+1) 0..1 arrays with rows and columns of permanents of all 2X2 subblocks lexicographically nondecreasing

16, 277, 12714, 1442543, 476276892, 470866502871, 1559031370472325

Offset

1,1

Comments

Diagonal of A204962

Links

Table of n, a(n) for n=1..7.

Example

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

Crossrefs

Sequence in context: A231695 A363754 A004382 * A189955 A038758 A240336

Adjacent sequences: A204952 A204953 A204954 * A204956 A204957 A204958

Keyword

nonn

Author

R. H. Hardin Jan 20 2012

Status

approved