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A183701 Number of (n+1)X(n+1) 0..3 arrays with every 2X2 subblock nonsingular 0
192, 108624, 710460576, 53961750797424, 47524363124861668992, 485531851352905710505726272, 57535515249805594625825370853448832 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A183710

LINKS

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

EXAMPLE

Some solutions for 3X3

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

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

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

CROSSREFS

Sequence in context: A234632 A208444 A146554 * A208795 A203490 A008698

Adjacent sequences:  A183698 A183699 A183700 * A183702 A183703 A183704

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 06 2011

STATUS

approved

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Last modified November 24 16:46 EST 2014. Contains 249899 sequences.