A221391 Number of 5Xn arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, with no 2-loops and with no occupancy greater than 2

0, 0, 40, 15181, 1829388, 229338911, 25415184702, 2810579281184, 304942133485122, 32982395377267648, 3554547354934938568, 382579389710396900732, 41139562348362648154196, 4421834681716006875081205

Offset

1,3

Comments

Row 5 of A221388

Links

R. H. Hardin, Table of n, a(n) for n = 1..17

Example

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

Crossrefs

Sequence in context: A309553 A123381 A210347 * A279578 A159680 A240628

Adjacent sequences: A221388 A221389 A221390 * A221392 A221393 A221394

Keyword

nonn

Author

R. H. Hardin Jan 14 2013

Status

approved