A221238 Number of nX4 arrays of occupancy after each element moves to some horizontal, vertical or antidiagonal neighbor, without 2-loops

0, 467, 67710, 8959341, 1130617545, 141336723259, 17607272065860, 2191088686237881, 272559108705818889, 33900194712220801503, 4216208061863101762098, 524365251673562024764232

Offset

1,2

Comments

Column 4 of A221240

Links

R. H. Hardin, Table of n, a(n) for n = 1..46

Example

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

Crossrefs

Sequence in context: A036340 A059395 A266163 * A114135 A043364 A054756

Adjacent sequences: A221235 A221236 A221237 * A221239 A221240 A221241

Keyword

nonn

Author

R. H. Hardin Jan 06 2013

Status

approved