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!)
A186919 Number of (n+1)X6 0..3 arrays with every 2X2 subblock trace equal to exactly one or two horizontal and vertical neighbor 2X2 subblock traces 0
166272, 86388160, 15491352288, 3861027028096, 833994044863296, 193942830390429600, 43448233709038001344, 9921625782478580791520 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A186923

LINKS

Table of n, a(n) for n=1..8.

EXAMPLE

Some solutions for 3X6

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

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

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

CROSSREFS

Sequence in context: A183834 A203274 A061741 * A185803 A250931 A319295

Adjacent sequences:  A186916 A186917 A186918 * A186920 A186921 A186922

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 28 2011

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 October 16 01:52 EDT 2021. Contains 348034 sequences. (Running on oeis4.)