OFFSET
1,1
LINKS
Max Alekseyev, Table of n, a(n) for n = 1..502 (first 448 terms from Amiram Eldar)
S. S. Wagstaff, Jr., The Cunningham Project
FORMULA
MATHEMATICA
PrimeOmega[5^Range[90]-1] (* Harvey P. Dale, Dec 16 2017 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Patrick De Geest, Nov 15 2000
STATUS
approved