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A144858 Numbers of the form 2^(n-1)*(2^n - 1) which aren't perfect numbers. 1
0, 1, 120, 2016, 32640, 130816, 523776, 2096128, 8386560, 134209536, 536854528, 2147450880, 34359607296, 549755289600, 2199022206976, 8796090925056, 35184367894528, 140737479966720, 562949936644096, 2251799780130816 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

A006516 with removed A000396.

LINKS

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

CROSSREFS

A006516, A000396

Sequence in context: A244838 A266343 A293972 * A084030 A056291 A056286

Adjacent sequences:  A144855 A144856 A144857 * A144859 A144860 A144861

KEYWORD

nonn

AUTHOR

Artur Jasinski, Sep 23 2008

STATUS

approved

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Last modified February 21 06:40 EST 2019. Contains 320371 sequences. (Running on oeis4.)