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A206630 Number of (n+1)X4 0..2 arrays with every 2X3 or 3X2 subblock having no more than four equal edges, and new values 0..2 introduced in row major order 1
1085, 86392, 6885875, 548812835, 43740991174, 3486207195767, 277854703424333, 22145337882995800, 1765008776141025599, 140673219629487281855, 11211816614428114906158, 893594616847882973762891 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A206635

LINKS

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

FORMULA

Empirical: a(n) = 66*a(n-1) +970*a(n-2) +9295*a(n-3) +33266*a(n-4) +72056*a(n-5) -224448*a(n-6) +362688*a(n-7) -1135552*a(n-8) +493824*a(n-9) -311808*a(n-10) +294912*a(n-11)

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A332069 A237804 A010091 * A191944 A157256 A223429

Adjacent sequences:  A206627 A206628 A206629 * A206631 A206632 A206633

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 10 2012

STATUS

approved

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Last modified January 19 00:03 EST 2021. Contains 340262 sequences. (Running on oeis4.)