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A145211 Maximal number of distinct shuffles of the identity permutation on n letters with another permutation on n letters. 0
1, 4, 14, 54, 197, 792 (list; graph; refs; listen; history; text; internal format)
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 A302171

Adjacent sequences:  A145208 A145209 A145210 * A145212 A145213 A145214

KEYWORD

nonn

AUTHOR

Camillia Smith Barnes, Oct 04 2008

STATUS

approved

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Last modified January 19 20:41 EST 2020. Contains 331066 sequences. (Running on oeis4.)