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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A196139 Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 3,0,4,1,2 for x=0,1,2,3,4 0
 1, 5, 7, 83, 481, 2599, 24615, 330889, 4431097, 82611569, 1973678929, 55783136985 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Every 0 is next to 0 3's, every 1 is next to 1 0's, every 2 is next to 2 4's, every 3 is next to 3 1's, every 4 is next to 4 2's Diagonal of A196146 LINKS EXAMPLE Some solutions for n=4 .1.3.1.0...0.1.3.1...1.3.1.0...0.0.1.1...0.1.1.0 .0.1.1.0...0.1.1.0...0.1.1.0...1.1.1.0...1.1.1.1 .1.1.1.1...0.1.1.0...0.1.1.1...3.1.1.0...1.0.0.1 .1.0.0.1...1.3.1.0...1.1.0.1...1.0.1.1...1.0.0.1 CROSSREFS Sequence in context: A340468 A351636 A062583 * A165784 A329006 A176619 Adjacent sequences: A196136 A196137 A196138 * A196140 A196141 A196142 KEYWORD nonn AUTHOR R. H. Hardin Sep 28 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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified March 21 14:15 EDT 2023. Contains 361408 sequences. (Running on oeis4.)