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A221116 Number of 4Xn arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, without 2-loops 1
0, 0, 51, 3706, 189762, 9107191, 423897591, 19542896293, 896843573267, 41075163197254, 1879441716510988, 85958060741822727, 3930554451621004497, 179712606810281833146, 8216432506372052839604, 375645902985042283582854 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Row 4 of A221114

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..20

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A172821 A172868 A015271 * A099397 A093251 A184282

Adjacent sequences:  A221113 A221114 A221115 * A221117 A221118 A221119

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 02 2013

STATUS

approved

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Last modified April 9 10:32 EDT 2020. Contains 333348 sequences. (Running on oeis4.)