A144858 Numbers of the form 2^(n-1)*(2^n - 1) which aren't perfect numbers.

0, 1, 120, 2016, 32640, 130816, 523776, 2096128, 8386560, 134209536, 536854528, 2147450880, 34359607296, 549755289600, 2199022206976, 8796090925056, 35184367894528, 140737479966720, 562949936644096, 2251799780130816

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