OFFSET
0,1
LINKS
Max Alekseyev, Table of n, a(n) for n = 0..471
EXAMPLE
a(3)=12 because 5^3+1 has divisors {1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 126}.
MAPLE
a:=n->numtheory[tau](5^n+1):
seq(a(n), n=0..100);
PROG
(PARI) a(n) = numdiv(5^n+1);
CROSSREFS
KEYWORD
nonn
AUTHOR
Sean A. Irvine, Oct 14 2023
STATUS
approved