A221242 - OEIS

A221242

Number of nX4 arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor

4, 484, 45369, 4096576, 367565584, 32940435025, 2951293792489, 264404315544196, 23687401278880161, 2122092173450945536, 190112409243526686921, 17031641464052384231241, 1525817148915719009233321

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Column 4 of A221245

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..21

FORMULA

Empirical: a(n) = 148*a(n-1) -6427*a(n-2) +118138*a(n-3) -1053200*a(n-4) +4793575*a(n-5) -11306353*a(n-6) +13398822*a(n-7) -7161939*a(n-8) +1435401*a(n-9) -59049*a(n-10)

EXAMPLE

Some solutions for n=3

..1..0..3..0....0..1..2..0....0..0..1..0....1..1..1..1....0..0..2..0

..1..4..1..0....0..0..1..1....1..2..0..2....1..3..0..1....2..1..1..2

..0..0..0..2....1..2..2..2....0..2..4..0....1..0..2..0....0..2..1..1

CROSSREFS

Sequence in context: A053941 A027678 A058442 * A075411 A114763 A069500

Adjacent sequences: A221239 A221240 A221241 * A221243 A221244 A221245

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 06 2013

STATUS

approved