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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A221430 Number of nX2 arrays of occupancy after each element moves to some king-move neighbor, without consecutive moves in the same direction 1
 1, 31, 286, 3295, 34477, 371116, 3952193, 42233189, 450737852, 4812507367, 51375286141, 548476573106, 5855368833337, 62510491196149, 667345378826444, 7124406585458739, 76058302324451277, 811978618013721140 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Column 2 of A221432 LINKS R. H. Hardin, Table of n, a(n) for n = 1..26 FORMULA Empirical: a(n) = 13*a(n-1) -13*a(n-2) -151*a(n-3) +286*a(n-4) -287*a(n-5) +833*a(n-6) -966*a(n-7) +488*a(n-8) +39*a(n-9) -63*a(n-10) +26*a(n-11) -2*a(n-12) EXAMPLE Some solutions for n=3 ..2..1....0..2....1..0....0..1....2..2....0..2....1..0....1..1....0..1....2..0 ..1..0....0..2....1..1....3..0....1..1....4..0....2..0....3..0....5..0....2..1 ..2..0....2..0....2..1....0..2....0..0....0..0....0..3....1..0....0..0....1..0 CROSSREFS Sequence in context: A161558 A336279 A156094 * A115151 A327561 A279980 Adjacent sequences:  A221427 A221428 A221429 * A221431 A221432 A221433 KEYWORD nonn AUTHOR R. H. Hardin Jan 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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified June 28 05:40 EDT 2022. Contains 354903 sequences. (Running on oeis4.)