OFFSET
1,1
LINKS
Max Alekseyev, Table of n, a(n) for n = 1..345 (first 329 terms from Amiram Eldar)
S. S. Wagstaff, Jr., The Cunningham Project
FORMULA
MATHEMATICA
PrimeOmega[Table[9^n + 1, {n, 1, 30}]] (* Amiram Eldar, Feb 02 2020 *)
PROG
(Magma) f:=func<n|&+[p[2]: p in Factorization(n)]>; [f(9^n + 1):n in [1..100]]; // Marius A. Burtea, Feb 02 2020
CROSSREFS
KEYWORD
nonn
AUTHOR
Patrick De Geest, Oct 15 2000
STATUS
approved