A188963 Number of nX2 array permutations with each element moved and moved by a city block distance of no more than three

1, 9, 265, 8132, 154564, 2790864, 55327556, 1139362932, 23084210737, 461656617041, 9241940662537, 185683704600857, 3732662042406464, 74976134234530448, 1505525933241030176, 30234928280320748560

Offset

1,2

Comments

Column 2 of A188966

Links

R. H. Hardin, Table of n, a(n) for n = 1..200

Example

Some solutions for 3X2
..3..0....1..0....2..4....5..2....1..0....5..3....2..5....3..4....3..4....5..3
..4..5....4..2....5..0....3..4....5..4....1..4....3..4....0..2....5..1....0..2
..1..2....5..3....1..3....0..1....2..3....0..2....0..1....5..1....2..0....1..4

Crossrefs

Sequence in context: A177393 A081059 A202884 * A306535 A144684 A191960

Adjacent sequences: A188960 A188961 A188962 * A188964 A188965 A188966

Keyword

nonn

Author

R. H. Hardin Apr 14 2011

Status

approved