A206630 - OEIS

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

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