A221486 Number of 4Xn arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, without consecutive moves in the same direction

0, 64, 313, 34751, 802711, 37622097, 1219698562, 47497298437, 1684060316110, 62602762212310, 2271866000217269, 83456368590958988, 3046870056535199883, 111585285541376641494, 4080105459850623520340, 149308509670479309110705

Offset

1,2

Comments

Row 4 of A221483

Links

R. H. Hardin, Table of n, a(n) for n = 1..23

Example

Some solutions for n=3
..1..2..0....0..2..0....0..3..0....1..1..1....0..2..0....0..3..0....0..1..0
..0..3..1....1..2..1....2..1..0....0..2..0....1..3..1....1..2..1....2..3..0
..1..1..1....0..3..1....0..2..2....1..2..1....1..1..1....1..1..0....0..2..1
..0..2..0....0..1..1....0..2..0....0..3..0....0..2..0....0..2..1....0..2..1

Crossrefs

Sequence in context: A299947 A372093 A251196 * A231942 A221686 A211258

Adjacent sequences: A221483 A221484 A221485 * A221487 A221488 A221489

Keyword

nonn

Author

R. H. Hardin Jan 17 2013

Status

approved