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A206117 Number of (n+1) X 8 0..3 arrays with every 2 X 3 or 3 X 2 subblock having exactly two counterclockwise and two clockwise edge increases. 1
5538732, 16072760, 59892000, 1542266208, 18371031840, 373319837280, 10214794664928, 127417290645600, 2621909765268000, 72022987084456800, 901477331317620000, 18550011589271100000, 509562633622531860000 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A206118.

LINKS

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

FORMULA

Empirical: a(n) = 7075*a(n-3) for n>10.

EXAMPLE

Some solutions for n=4:

..1..1..0..0..3..1..1..2....2..3..1..2..1..1..0..2....2..3..0..0..1..0..1..0

..0..0..2..0..0..2..1..1....3..3..1..1..2..1..1..0....3..0..0..2..0..0..1..1

..1..0..0..1..0..0..3..1....1..1..2..1..1..3..1..1....0..0..1..0..0..2..3..3

..3..1..0..0..1..0..0..2....3..1..1..0..1..1..2..1....3..3..0..0..1..3..3..0

..3..3..1..0..0..3..0..2....0..2..1..1..0..1..1..0....2..3..0..1..3..3..2..3

CROSSREFS

Sequence in context: A254188 A253800 A158760 * A237973 A204528 A092019

Adjacent sequences:  A206114 A206115 A206116 * A206118 A206119 A206120

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 03 2012

STATUS

approved

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Last modified September 24 07:17 EDT 2021. Contains 347623 sequences. (Running on oeis4.)