A221814 Number of nX3 arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, without move-in move-out straight through or left turns

0, 16, 14, 379, 1052, 11079, 47390, 361950, 1871008, 12486680, 70263638, 442461347, 2585100812, 15871512853, 94285153508, 572472852419, 3425837212298, 20699323338492, 124271759172208, 749252532667069, 4504672207533346

Offset

1,2

Comments

Column 3 of A221817

Links

R. H. Hardin, Table of n, a(n) for n = 1..41

Example

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

Crossrefs

Sequence in context: A184752 A291468 A072311 * A159454 A334350 A306305

Adjacent sequences: A221811 A221812 A221813 * A221815 A221816 A221817

Keyword

nonn

Author

R. H. Hardin Jan 26 2013

Status

approved