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A221392 Number of 6Xn arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, with no 2-loops and with no occupancy greater than 2 0
0, 0, 121, 191832, 63358088, 23796035743, 7392392443622, 2337157741074086, 714565383546558879, 218604352253920063447, 66455737946796228603868, 20186583052419136813733221, 6123478328359855143647144369 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Row 6 of A221388

LINKS

Table of n, a(n) for n=1..13.

EXAMPLE

Some solutions for n=3

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

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

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

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

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

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

CROSSREFS

Sequence in context: A013749 A178192 A135825 * A337728 A227301 A261364

Adjacent sequences:  A221389 A221390 A221391 * A221393 A221394 A221395

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 14 2013

STATUS

approved

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Last modified May 16 22:37 EDT 2022. Contains 353724 sequences. (Running on oeis4.)