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A205984 Number of (n+1)X7 0..2 arrays with every 2X3 or 3X2 subblock having exactly two clockwise edge increases 1
315357, 591336, 1599096, 7793856, 50843904, 338009472, 2260666464, 15125213376, 101283221088, 678162489984, 4537566722304, 30384966326400, 203448746995200, 1361270016691200, 9115489897920000, 61034624098560000, 408381005007360000 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A205986

LINKS

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

FORMULA

Empirical: a(n) = 300*a(n-3) for n>11

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A092014 A250501 A234656 * A253748 A253755 A309238

Adjacent sequences:  A205981 A205982 A205983 * A205985 A205986 A205987

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 02 2012

STATUS

approved

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Last modified June 18 10:54 EDT 2021. Contains 345098 sequences. (Running on oeis4.)