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A183707 Number of (n+1)X7 0..3 arrays with every 2X2 subblock nonsingular 1
67718760, 401390133264, 2365244332190880, 13954952466340976784, 82311212150455188873408, 485531851352905710505726272, 2863979225676951763894821578784, 16893652701074804322774461983910592 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A183710

LINKS

Ron Hardin, Table of n, a(n) for n = 1..51

EXAMPLE

Some solutions for 3X7

..0..2..0..2..0..3..1....0..2..0..2..1..3..2....0..2..0..2..2..3..0

..2..0..2..0..2..1..2....2..0..2..0..3..2..2....2..0..2..0..2..2..1

..0..1..0..2..2..0..1....0..1..0..1..2..1..3....0..1..0..2..0..1..0

CROSSREFS

Sequence in context: A089081 A161774 A203670 * A256274 A158890 A230746

Adjacent sequences:  A183704 A183705 A183706 * A183708 A183709 A183710

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 06 2011

STATUS

approved

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Last modified December 9 04:45 EST 2021. Contains 349626 sequences. (Running on oeis4.)