A145211 Maximal number of distinct shuffles of the identity permutation on n letters with another permutation on n letters.

1, 4, 14, 54, 197, 792

Offset

1,2

Comments

For n=4,5,6, the maximum number is achieved by the following permutations, respectively: 3412, 34512, 456123.

References

C. Smith, dissertation, Harvard University, forthcoming.

Links

Table of n, a(n) for n=1..6.

Example

For n=2, the distinct shuffles of 12 with 21 are: 1221, 1212, 2112, 2121.

Crossrefs

Sequence in context: A000651 A192247 A118896 * A060898 A180142 A363545

Adjacent sequences: A145208 A145209 A145210 * A145212 A145213 A145214

Keyword

nonn

Author

Camillia Smith Barnes, Oct 04 2008

Status

approved