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A206213 Number of (n+1)X7 0..2 arrays with every 2X3 or 3X2 subblock having exactly two equal edges, and new values 0..2 introduced in row major order 1
8802, 9072, 14416, 74080, 359424, 1764000, 9438912, 46540800, 228988224, 1227058560, 6050304000, 29768469120, 159517612800, 786539520000, 3869900985600, 20737289664000, 102250137600000, 503087128128000 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A206215

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

FORMULA

Empirical: a(n) = 130*a(n-3) for n>9

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A249956 A031791 A179128 * A270609 A230335 A183752

Adjacent sequences:  A206210 A206211 A206212 * A206214 A206215 A206216

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 04 2012

STATUS

approved

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Last modified November 27 12:51 EST 2021. Contains 349394 sequences. (Running on oeis4.)