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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
OFFSET
1,1
COMMENTS
Column 7 of A206238.
LINKS
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
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 05 2012
STATUS
approved