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A221242 Number of nX4 arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor 1
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

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Last modified May 7 14:09 EDT 2021. Contains 343650 sequences. (Running on oeis4.)