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A206593 Number of (n+1)X(n+1) 0..3 arrays with every 2X3 or 3X2 subblock having no more than three equal edges, and new values 0..3 introduced in row major order 0
15, 9449, 122794254, 23138312968770, 63074271731085058880 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A206600

LINKS

Table of n, a(n) for n=1..5.

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A249967 A308156 A304397 * A200794 A230173 A271403

Adjacent sequences:  A206590 A206591 A206592 * A206594 A206595 A206596

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 09 2012

STATUS

approved

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Last modified September 18 06:07 EDT 2021. Contains 347509 sequences. (Running on oeis4.)