OFFSET
0,2
LINKS
Max Alekseyev, Table of n, a(n) for n = 0..345
FORMULA
a(n) = A366580(2*n). - Max Alekseyev, Jan 08 2024
MATHEMATICA
PrimeNu[9^Range[0, 90]+1] (* Harvey P. Dale, Jul 04 2024 *)
PROG
(PARI) for(n = 0, 100, print1(omega(9^n + 1), ", "))
CROSSREFS
KEYWORD
nonn
AUTHOR
Sean A. Irvine, Oct 15 2023
STATUS
approved