A221807 Number of nX4 arrays of occupancy after each element moves to some horizontal, vertical or antidiagonal neighbor, without move-in move-out straight through or left turns

1, 214, 3906, 197048, 6328365, 247277805, 8830682187, 328546555815, 11994407265981, 441751061429506, 16202916180999264, 595448412788077566, 21862647259907974086, 803056054269698852052, 29491857372420704871557

Offset

1,2

Comments

Column 4 of A221809

Links

R. H. Hardin, Table of n, a(n) for n = 1..27

Example

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

Crossrefs

Sequence in context: A076159 A258961 A204486 * A200043 A184600 A278093

Adjacent sequences: A221804 A221805 A221806 * A221808 A221809 A221810

Keyword

nonn

Author

R. H. Hardin Jan 26 2013

Status

approved