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A206236
Number of (n+1)X7 0..3 arrays with every 2X3 or 3X2 subblock having exactly two equal edges, and new values 0..3 introduced in row major order
1
51066, 170728, 607008, 9042600, 118573968, 1448239080, 22535636736, 303011941944, 3712941210144, 57939122017416, 779043702707184, 9545971851249384, 148961482706745696, 2002921359660139224
OFFSET
1,1
COMMENTS
Column 6 of A206238
LINKS
FORMULA
Empirical: a(n) = a(n-1) +2571*a(n-3) -2571*a(n-4) for n>10
EXAMPLE
Some solutions for n=4
..0..0..1..0..0..1..0....0..0..1..0..0..1..0....0..0..1..0..0..1..2
..0..2..0..0..2..0..0....1..0..0..1..0..0..1....0..1..0..0..3..2..2
..1..0..0..2..0..0..2....2..3..0..0..1..0..0....2..0..0..3..2..2..1
..0..0..1..0..0..3..1....2..2..1..0..0..1..1....0..0..1..2..2..3..0
..3..3..0..0..2..1..1....3..2..2..3..0..1..2....3..3..2..2..3..0..0
CROSSREFS
Sequence in context: A237222 A178283 A252207 * A233901 A076710 A203405
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 05 2012
STATUS
approved