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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A230169 Number of n X n 0..2 arrays x(i,j) with each element horizontally, vertically, diagonally or antidiagonally next to at least one element with value 2-x(i,j) 0
 0, 27, 3787, 4722977, 49754476927, 4381081731832923, 3274958849115023706081 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Diagonal of A230176 LINKS Table of n, a(n) for n=1..7. EXAMPLE Some solutions for n=3 ..1..0..0....0..2..1....0..0..1....1..0..2....1..1..0....0..0..2....2..1..1 ..1..2..0....1..2..1....2..0..1....1..0..2....1..0..2....2..1..2....2..0..1 ..2..0..2....1..0..0....1..1..2....1..1..0....1..2..2....0..1..1....0..2..1 CROSSREFS Sequence in context: A166750 A195374 A238698 * A271240 A223327 A211927 Adjacent sequences: A230166 A230167 A230168 * A230170 A230171 A230172 KEYWORD nonn AUTHOR R. H. Hardin, Oct 11 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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified August 5 15:49 EDT 2024. Contains 374950 sequences. (Running on oeis4.)