The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A199258 Number of 3nX2 0..2 arrays with values 0..2 introduced in row major order, the number of instances of each value within one of each other, and every element equal to exactly one horizontal or vertical neighbor 1
 3, 36, 449, 6024, 83890, 1203424, 17634348, 262690636, 3964097574, 60448089272, 929736185578, 14403575178424, 224514368663504, 3518109050510528, 55381725681044520, 875329086340050012, 13884232495508832254 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS 3n elements of column 2 of A199261 LINKS R. H. Hardin, Table of n, a(n) for n = 1..99 EXAMPLE Some solutions for n=3 ..0..0....0..0....0..0....0..1....0..0....0..1....0..0....0..0....0..1....0..0 ..1..1....1..1....1..1....0..1....1..1....0..1....1..2....1..1....0..1....1..1 ..0..2....0..0....2..2....2..2....0..0....2..2....1..2....2..0....1..2....2..2 ..0..2....2..2....1..1....0..1....2..2....0..0....0..0....2..0....1..2....1..1 ..2..1....1..1....0..2....0..1....1..1....2..2....2..2....1..1....2..0....0..0 ..2..1....2..2....0..2....2..0....2..2....1..1....1..1....2..0....2..0....2..2 ..1..0....0..0....1..1....2..0....1..1....0..0....2..2....2..0....1..1....0..0 ..1..0....2..1....2..2....1..2....2..0....1..2....0..0....1..1....2..2....1..1 ..2..2....2..1....0..0....1..2....2..0....1..2....1..1....2..2....0..0....2..2 CROSSREFS Sequence in context: A249894 A099670 A259131 * A262465 A322491 A305678 Adjacent sequences:  A199255 A199256 A199257 * A199259 A199260 A199261 KEYWORD nonn AUTHOR R. H. Hardin Nov 04 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.

Last modified January 17 22:33 EST 2022. Contains 350410 sequences. (Running on oeis4.)