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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A206238

LINKS

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

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

Adjacent sequences:  A206233 A206234 A206235 * A206237 A206238 A206239

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 05 2012

STATUS

approved

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Last modified January 28 05:27 EST 2022. Contains 350654 sequences. (Running on oeis4.)