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A227023 Number of nX4 (0,1,2) arrays of permanents of 2X2 subblocks of some (n+1)X5 binary array with rows and columns of the latter in lexicographically nondecreasing order 1
18, 171, 1366, 10050, 65317, 375270, 1924848, 8908719, 37616613, 146387460, 529743352, 1796459014, 5746888515, 17440783714, 50456503591, 139731086307, 371756133099, 953183208702, 2361809765393, 5669196636680, 13211336518266 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A227025

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..37

EXAMPLE

Some solutions for n=4

..0..0..1..1....0..0..1..1....0..0..0..1....0..0..0..0....0..0..0..1

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

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

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

CROSSREFS

Sequence in context: A341228 A022583 A321951 * A239581 A213350 A052507

Adjacent sequences:  A227020 A227021 A227022 * A227024 A227025 A227026

KEYWORD

nonn

AUTHOR

R. H. Hardin Jun 27 2013

STATUS

approved

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Last modified June 25 04:09 EDT 2021. Contains 345452 sequences. (Running on oeis4.)