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A206110 Number of (n+1) X (n+1) 0..3 arrays with every 2 X 3 or 3 X 2 subblock having exactly two counterclockwise and two clockwise edge increases. 1
256, 5228, 88596, 5048352, 190349280, 24408220320, 10214794664928, 3260439951760800, 3545593194352716000, 12774731370996169188000, 35992614807976653175327200, 345829680669306156240540420000 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A206118.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..13

EXAMPLE

Some solutions for n=4:

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

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

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

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

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

CROSSREFS

Sequence in context: A016804 A115111 A200790 * A196152 A113173 A223964

Adjacent sequences:  A206107 A206108 A206109 * A206111 A206112 A206113

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 03 2012

STATUS

approved

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Last modified October 19 22:55 EDT 2019. Contains 328244 sequences. (Running on oeis4.)