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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A233220 Number of 4Xn 0..5 arrays with no element x(i,j) adjacent to value 5-x(i,j) horizontally or antidiagonally, top left element zero, and 1 appearing before 2 3 and 4, and 2 appearing before 3 in row major order 1
 48, 10313, 3638416, 1340889772, 496475792293, 183912498314536, 68131170547319605, 25239611378677465012, 9350174239701150626293, 3463831582475143352295856, 1283198472110498311312723525 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Row 4 of A233217 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 463*a(n-1) -37470*a(n-2) +1233734*a(n-3) -20184680*a(n-4) +174604620*a(n-5) -799830930*a(n-6) +1856211162*a(n-7) -1978514343*a(n-8) +766517445*a(n-9) for n>12 EXAMPLE Some solutions for n=2 ..0..1....0..1....0..1....0..1....0..1....0..0....0..0....0..1....0..1....0..1 ..2..4....2..2....1..1....2..2....1..0....1..0....1..5....2..1....0..2....2..0 ..4..2....1..2....2..2....4..3....2..2....0..0....1..2....2..0....0..2....1..3 ..4..4....5..1....4..4....1..1....5..4....4..2....5..5....3..3....0..4....0..1 CROSSREFS Sequence in context: A232160 A260212 A295590 * A123478 A275570 A307618 Adjacent sequences: A233217 A233218 A233219 * A233221 A233222 A233223 KEYWORD nonn AUTHOR R. H. Hardin, Dec 06 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 4 03:55 EDT 2023. Contains 363118 sequences. (Running on oeis4.)