OFFSET
1,1
LINKS
Max Alekseyev, Table of n, a(n) for n = 1..387 (first 372 terms from Amiram Eldar)
S. S. Wagstaff, Jr., The Cunningham Project
FORMULA
MATHEMATICA
PrimeOmega[Table[7^n + 1, {n, 1, 30}]] (* Amiram Eldar, Feb 02 2020 *)
PROG
(Magma) f:=func<n|&+[p[2]: p in Factorization(n)]>; [f(7^n + 1):n in [1..110]]; // Marius A. Burtea, Feb 02 2020
CROSSREFS
KEYWORD
nonn
AUTHOR
Patrick De Geest, Oct 15 2000
STATUS
approved