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A040173 Numerator of probability that 2 elements of S_n chosen at random (with replacement) generate S_n. 3
1, 3, 1, 3, 19, 53, 103, 4111, 78293, 29401, 4462987, 9830941, 284397779 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
Eric Weisstein's World of Mathematics, Symmetric Group.
EXAMPLE
Values for n=1,2,3,... are 1, 3/4, 1/2, 3/8, 19/40, 53/120, 103/168, 4111/6720, 78293/120960, ...
CROSSREFS
Probability is A040173/A040174 = A040175/n!.
Sequence in context: A361840 A361839 A160708 * A320952 A128777 A286892
KEYWORD
nonn,nice,frac,more
AUTHOR
EXTENSIONS
a(10)-a(13) from Stephen A. Silver, Feb 21 2013
STATUS
approved

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Last modified February 26 16:20 EST 2024. Contains 370352 sequences. (Running on oeis4.)