login
This site is supported by donations to The OEIS Foundation.

 

Logo

Annual Appeal: Please make a donation (tax deductible in USA) to keep the OEIS running. Over 5000 articles have referenced us, often saying "we discovered this result with the help of the OEIS".

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A198283 Number of 2nX12 0..2 arrays with values 0..2 introduced in row major order and each element equal to exactly two horizontal and vertical neighbors 1
16, 700, 31718, 1478756, 70004726, 3337609528, 158791292898, 7572454386112, 361223237102398, 17233549055351780, 822235886561754748, 39230600563964575264, 1871782716035228820002, 89307446755046275015160 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A198285

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..20

EXAMPLE

Some solutions for n=3

..0..0..0..0..0..0..1..1..1..1..1..1....0..0..1..1..1..1..1..1..1..1..0..0

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

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

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

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

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

CROSSREFS

Sequence in context: A222139 A036513 A123824 * A264114 A201622 A220809

Adjacent sequences:  A198280 A198281 A198282 * A198284 A198285 A198286

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 23 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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified December 9 10:23 EST 2016. Contains 278971 sequences.