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A068107 n! sum{k=1 to n} mu(k)/k!, where mu(k) is the Moebius function. 0
1, 1, 2, 8, 39, 235, 1644, 13152, 118368, 1183681, 13020490, 156245880, 2031196439, 28436750147, 426551252206, 6824820035296, 116021940600031, 2088394930800558, 39679503685210601, 793590073704212020 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..20.

CROSSREFS

Sequence in context: A218321 A059275 A020047 * A217945 A091073 A154132

Adjacent sequences:  A068104 A068105 A068106 * A068108 A068109 A068110

KEYWORD

nonn

AUTHOR

Leroy Quet Mar 22 2002

STATUS

approved

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Last modified May 20 02:57 EDT 2013. Contains 225446 sequences.