A221489 - OEIS

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, 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