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A206237 Number of (n+1) X 8 0..3 arrays with every 2 X 3 or 3 X 2 subblock having exactly two equal edges, and new values 0..3 introduced in row major order. 1
294546, 943584, 3503136, 95322432, 1122086640, 22535636736, 649065145152, 8026428934128, 163621204516992, 4735717646406528, 58825697658136176, 1199179807904946432, 34708074630513355776, 431133538136479945968 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A206238.

LINKS

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

FORMULA

Empirical: a(n) = a(n-1) +7329*a(n-3) -7329*a(n-4) for n>11.

EXAMPLE

Some solutions for n=4:

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

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

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

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

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

CROSSREFS

Sequence in context: A178997 A328938 A291637 * A236153 A023351 A258534

Adjacent sequences:  A206234 A206235 A206236 * A206238 A206239 A206240

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 05 2012

STATUS

approved

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Last modified November 30 09:34 EST 2021. Contains 349419 sequences. (Running on oeis4.)