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A183697 Number of (n+1)X9 0..2 arrays with every 2X2 subblock nonsingular 1
19165418, 43352455562, 95843840904146, 213413389362873662, 474135214633449382230, 1054127029029754862576918, 2343065856411597861794635150, 5208444026905229671830632661366 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 8 of A183698

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..28

EXAMPLE

Some solutions for 3X9

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

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

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

CROSSREFS

Sequence in context: A251389 A138025 A184790 * A022248 A224627 A038683

Adjacent sequences:  A183694 A183695 A183696 * A183698 A183699 A183700

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 06 2011

STATUS

approved

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Last modified April 23 06:08 EDT 2019. Contains 322381 sequences. (Running on oeis4.)