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A184651 Number of (n+2)X4 0..3 arrays with each 3X3 subblock nonsingular 1
11826498, 2393686398, 484872198498, 98159708768710, 19873044281563890, 4023477498134224486, 814585573094687997378, 164919489595820615871894, 33389299480927975477593698, 6759936480082800776073384278 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A184652

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..31

EXAMPLE

Some solutions for 6X4

..0..0..2..0....0..0..2..0....0..0..2..0....0..0..2..0....0..0..2..0

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

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

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

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

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

CROSSREFS

Sequence in context: A228978 A234831 A280983 * A123086 A208490 A272021

Adjacent sequences:  A184648 A184649 A184650 * A184652 A184653 A184654

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 19 2011

STATUS

approved

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Last modified December 5 23:38 EST 2021. Contains 349558 sequences. (Running on oeis4.)