The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A221403 Number of 4 X n arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, with no 2-loops and with no occupancy greater than 2. 0
 0, 38, 144, 89173, 2294372, 247200529, 10874636860, 776880319370, 41186123651894, 2584866896797503, 146335664855961366 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Row 4 of A221400. LINKS EXAMPLE Some solutions for n=3 ..0..2..0....0..2..0....0..2..0....0..2..0....0..2..0....0..2..0....1..2..1 ..2..2..1....2..2..0....2..2..0....1..2..2....1..2..0....0..2..2....1..2..0 ..0..2..0....0..2..2....1..2..0....0..2..0....1..2..1....0..2..2....0..2..0 ..0..2..1....0..2..0....0..2..1....1..2..0....1..2..0....0..2..0....0..2..1 CROSSREFS Sequence in context: A158525 A044370 A044751 * A320309 A164093 A158064 Adjacent sequences:  A221400 A221401 A221402 * A221404 A221405 A221406 KEYWORD nonn AUTHOR R. H. Hardin, Jan 15 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
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified June 24 21:50 EDT 2021. Contains 345433 sequences. (Running on oeis4.)