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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A240887 Number of n X n 0..2 arrays with no element equal to a different number of vertical neighbors than horizontal neighbors, with new values 0..2 introduced in row major order 0
 1, 4, 57, 2362, 245268, 64074526, 41971040844, 69012323813116, 284711573170326892 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Diagonal of A240893 LINKS Table of n, a(n) for n=1..9. EXAMPLE Some solutions for n=4 ..0..1..2..1....0..1..0..1....0..1..0..0....0..1..0..2....0..1..0..2 ..2..0..1..0....1..0..2..0....1..2..0..0....2..0..1..0....1..0..2..0 ..0..1..2..1....0..2..1..1....0..0..1..1....0..2..0..1....2..1..0..1 ..1..2..1..2....2..0..1..1....0..0..1..1....2..0..1..2....0..2..1..0 CROSSREFS Sequence in context: A358687 A209317 A231491 * A209316 A221866 A270881 Adjacent sequences: A240884 A240885 A240886 * A240888 A240889 A240890 KEYWORD nonn AUTHOR R. H. Hardin, Apr 14 2014 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 September 15 08:13 EDT 2024. Contains 375932 sequences. (Running on oeis4.)