1,2

Amiram Eldar, Table of n, a(n) for n = 1..660

S. S. Wagstaff, Jr., The Cunningham Project

Mobius transform of A085028. - T. D. Noe, Jun 19 2003

a(n) = A001222(A024023(n)). - Amiram Eldar, Feb 01 2020

(PARI) a(n)=bigomega(3^n-1) \\ Charles R Greathouse IV, Sep 14 2015

Cf. A001222, A024023, A057951-A057958, A046051, A085028.

Sequence in context: A143309 A206562 A155981 * A225411 A247815 A057953

Adjacent sequences: A057955 A057956 A057957 * A057959 A057960 A057961

nonn

Patrick De Geest, Nov 15 2000

Offset corrected by Amiram Eldar, Feb 01 2020

approved