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A204955 Number of (n+1)X(n+1) 0..1 arrays with rows and columns of permanents of all 2X2 subblocks lexicographically nondecreasing 0
16, 277, 12714, 1442543, 476276892, 470866502871, 1559031370472325 (list; graph; refs; listen; history; text; internal format)
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: A221176 A231695 A004382 * A189955 A038758 A240336

Adjacent sequences:  A204952 A204953 A204954 * A204956 A204957 A204958

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 20 2012

STATUS

approved

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Last modified September 15 14:38 EDT 2019. Contains 327078 sequences. (Running on oeis4.)