This site is supported by donations to The OEIS Foundation.

 Annual appeal: Please make a donation to keep the OEIS running! Over 6000 articles have referenced us, often saying "we discovered this result with the help of the OEIS". Other ways to donate

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A230330 Number of n X n 0..2 arrays x(i,j) with each element horizontally, vertically or antidiagonally next to at least one element with value (x(i,j)+1) mod 3, and upper left element zero 0
 0, 6, 534, 438284, 2788320240, 137077642883940, 52211092034409972862, 154024647784870223714406548, 3519277849947878097413487571658476 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Diagonal of A230337 LINKS EXAMPLE Some solutions for n=3 ..0..0..0....0..1..0....0..2..2....0..2..1....0..0..2....0..0..1....0..1..2 ..1..2..1....2..0..0....1..0..1....1..0..1....1..2..2....1..2..1....1..0..0 ..1..2..0....2..2..1....0..2..1....2..0..2....1..1..0....0..2..0....2..1..2 CROSSREFS Sequence in context: A000411 A180431 A202967 * A252174 A251697 A173789 Adjacent sequences:  A230327 A230328 A230329 * A230331 A230332 A230333 KEYWORD nonn AUTHOR R. H. Hardin, Oct 16 2013 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.