

A206321


Number of (n+1)X3 0..3 arrays with every 2X3 or 3X2 subblock having exactly three clockwise edge increases


1



1344, 16892, 282996, 4796092, 81302880, 1377662868, 23340152044, 395403752128, 6698395782004, 113474612575628, 1922321318016168, 32565148864444732, 551670927155642340, 9345598309321513584, 158319393789428735572
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OFFSET

1,1


COMMENTS

Column 2 of A206327


LINKS

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


FORMULA

Empirical: a(n) = 24*a(n1) 131*a(n2) +200*a(n3) 116*a(n4) +35*a(n5) 13*a(n6) +2*a(n7) for n>10


EXAMPLE

Some solutions for n=4
..3..0..3....3..2..3....0..3..2....3..0..0....2..2..1....2..3..3....1..0..0
..3..1..0....1..0..1....1..0..3....2..1..2....1..0..2....0..1..0....0..2..1
..3..2..1....0..3..0....2..1..0....3..0..3....2..1..3....3..0..3....1..0..2
..1..0..2....1..0..3....1..0..3....2..1..2....0..2..0....2..2..0....3..1..3
..2..1..3....3..1..0....2..1..0....3..0..3....0..3..1....0..2..1....3..2..1


CROSSREFS

Sequence in context: A205820 A202430 A268907 * A230974 A239192 A172686
Adjacent sequences: A206318 A206319 A206320 * A206322 A206323 A206324


KEYWORD

nonn


AUTHOR

R. H. Hardin Feb 06 2012


STATUS

approved



