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A221489 Number of 7Xn arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, without consecutive moves in the same direction 0
0, 4096, 78880, 538159483, 178388225956, 224856636340095, 144288378372479004 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 7 of A221483

LINKS

Table of n, a(n) for n=1..7.

EXAMPLE

Some solutions for n=3

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

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

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

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

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

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

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

CROSSREFS

Sequence in context: A016996 A218527 A017068 * A017260 A027859 A017368

Adjacent sequences:  A221486 A221487 A221488 * A221490 A221491 A221492

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 17 2013

STATUS

approved

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Last modified October 28 11:10 EDT 2020. Contains 338054 sequences. (Running on oeis4.)