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Search: id:A046165
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A046165 Number of minimal covers on n objects. +0
7
1, 2, 8, 49, 462, 6424, 129425, 3731508, 152424420, 8780782707, 710389021036, 80610570275140, 12815915627480695, 2855758994821922882, 892194474524889501292, 391202163933291014701953 (list; graph; listen)
OFFSET

1,2

LINKS

Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.

FORMULA

E.g.f.: Sum((exp(x)-1)^n*exp(x*(2^n-n-1))/n!, n=0..infinity). - Vladeta Jovovic (vladeta(AT)Eunet.yu), May 08 2004

CROSSREFS

Cf. A035348.

Sequence in context: A088181 A058864 A136226 this_sequence A114619 A027047 A034491

Adjacent sequences: A046162 A046163 A046164 this_sequence A046166 A046167 A046168

KEYWORD

nonn

AUTHOR

Eric Weisstein (eric(AT)weisstein.com)

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.


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