

A206147


Number of (n+1) X 6 0..2 arrays with every 2 X 3 or 3 X 2 subblock having exactly three counterclockwise and three clockwise edge increases.


1



1458, 23346, 379602, 6204438, 101596896, 1664748270, 27284864220, 447232269654, 7330916855718, 120167900345196, 1969792468989480, 32288891319485190, 529280670290557896, 8675989562774602188, 142217172462541690296
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OFFSET

1,1


COMMENTS

Column 5 of A206150.


LINKS

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


FORMULA

Empirical: a(n) = 30*a(n1)  291*a(n2) + 1278*a(n3)  2901*a(n4) + 3519*a(n5)  2152*a(n6) + 516*a(n7).


EXAMPLE

Some solutions for n=4:
..0..1..2..0..1..2....2..0..1..2..0..2....2..1..0..1..2..0....1..0..1..2..1..2
..1..0..1..2..0..1....0..2..0..1..2..0....0..2..1..2..1..2....2..1..2..0..2..1
..0..1..2..1..2..0....1..0..1..0..1..2....1..0..2..0..2..1....1..2..0..2..1..0
..2..0..1..0..1..2....2..1..2..1..2..0....2..1..0..1..0..2....0..1..2..1..0..1
..0..1..0..1..2..1....0..2..0..2..0..2....1..2..1..0..1..0....1..2..1..2..1..0


CROSSREFS

Sequence in context: A255345 A091715 A224528 * A035764 A107560 A276101
Adjacent sequences: A206144 A206145 A206146 * A206148 A206149 A206150


KEYWORD

nonn


AUTHOR

R. H. Hardin, Feb 04 2012


STATUS

approved



