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A205199 Number of (n+1)X(n+1) 0..2 arrays with the permanents of 2X2 subblocks nondecreasing rightwards and downwards 0
81, 6138, 1649549, 1099532113, 2353566223899, 13538086185801579, 239515966345579392136 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A205206

LINKS

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

EXAMPLE

Some solutions for n=4

..0..2..2..2..0....0..2..1..2..2....2..1..1..2..2....2..0..0..1..1

..1..2..0..2..2....2..2..1..2..1....1..0..2..1..2....2..0..1..2..1

..2..0..2..2..2....1..1..2..2..2....2..1..2..2..2....2..0..0..1..2

..2..2..0..2..2....2..2..2..1..2....0..2..1..2..1....2..0..1..2..2

..0..2..2..2..2....1..1..2..2..2....2..1..2..2..2....2..0..2..2..2

CROSSREFS

Sequence in context: A212706 A036354 A205887 * A250612 A228974 A178513

Adjacent sequences:  A205196 A205197 A205198 * A205200 A205201 A205202

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 23 2012

STATUS

approved

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Last modified November 30 06:28 EST 2021. Contains 349419 sequences. (Running on oeis4.)