A222092 Number of nX4 arrays of occupancy after each element stays put or moves to some horizontal, vertical or antidiagonal neighbor, without move-in move-out left turns

21, 3014, 439644, 62776264, 8936245171, 1271770432077, 181000238870646, 25760940724765249, 3666476510299319316, 521840279989725924865, 74272277349160073400124, 10570998423180909949529557

Offset

1,1

Comments

Column 4 of A222093

Links

R. H. Hardin, Table of n, a(n) for n = 1..24

Example

Some solutions for n=3
..0..1..1..3....0..2..0..1....0..3..1..0....0..4..0..2....0..1..2..2
..0..1..1..1....0..3..1..0....0..0..2..1....0..1..1..0....0..2..1..1
..0..3..0..1....0..2..3..0....1..2..2..0....1..0..3..0....1..1..1..0

Crossrefs

Sequence in context: A220999 A231825 A347604 * A222096 A018238 A189447

Adjacent sequences: A222089 A222090 A222091 * A222093 A222094 A222095

Keyword

nonn

Author

R. H. Hardin Feb 07 2013

Status

approved