login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A206114 Number of (n+1) X 5 0..3 arrays with every 2 X 3 or 3 X 2 subblock having exactly two counterclockwise and two clockwise edge increases. 1
31756, 111552, 520800, 5048352, 21702240, 157206240, 1542266208, 6705992160, 48576728160, 476560258272, 2072151577440, 15010209001440, 147257119806048, 640294837428960, 4638154581444960, 45502450020068832, 197851104765548640 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A206118.

LINKS

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

FORMULA

Empirical: a(n) = 309*a(n-3) for n>7.

EXAMPLE

Some solutions for n=4:

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

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

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

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

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

CROSSREFS

Sequence in context: A154471 A184206 A193742 * A252034 A284519 A183704

Adjacent sequences:  A206111 A206112 A206113 * A206115 A206116 A206117

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 03 2012

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified January 27 14:39 EST 2020. Contains 331295 sequences. (Running on oeis4.)