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!)
A206091 Number of (n+1) X 6 0..2 arrays with every 2 X 3 or 3 X 2 subblock having exactly two counterclockwise and two clockwise edge increases. 1
13608, 17976, 33792, 131904, 516912, 2156544, 8613504, 34039392, 142331904, 568491264, 2246599872, 9393905664, 37520423424, 148275591552, 619997773824, 2476347945984, 9786189042432, 40919853072384, 163438964434944 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A206094.

LINKS

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

FORMULA

Empirical: a(n) = 66*a(n-3) for n>8.

EXAMPLE

Some solutions for n=4:

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

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

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

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

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

CROSSREFS

Sequence in context: A108418 A232447 A237893 * A218456 A224971 A185471

Adjacent sequences:  A206088 A206089 A206090 * A206092 A206093 A206094

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 June 12 23:21 EDT 2021. Contains 344979 sequences. (Running on oeis4.)