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A221353 Number of 3Xn arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, without 2-loops 0
0, 7, 370, 12296, 364868, 10612940, 304064432, 8672312531, 246687608692, 7009800248655, 199081627533706, 5652690459992416, 160483388497482942, 4555988975443640203 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 3 of A221351

LINKS

Table of n, a(n) for n=1..14.

EXAMPLE

Some solutions for n=3

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

..2..1..1....2..1..0....2..5..1....1..3..1....2..2..0....1..3..2....1..3..1

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

CROSSREFS

Sequence in context: A057634 A203706 A145181 * A222870 A270247 A270228

Adjacent sequences:  A221350 A221351 A221352 * A221354 A221355 A221356

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 11 2013

STATUS

approved

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Last modified November 28 01:24 EST 2021. Contains 349396 sequences. (Running on oeis4.)