

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
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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(n1) +970*a(n2) +9295*a(n3) +33266*a(n4) +72056*a(n5) 224448*a(n6) +362688*a(n7) 1135552*a(n8) +493824*a(n9) 311808*a(n10) +294912*a(n11)


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



