OFFSET
1,6
LINKS
Antti Karttunen, Table of n, a(n) for n = 1..22001
FORMULA
EXAMPLE
For n=50, with proper divisors [1, 2, 5, 10, 25], 2, 5, and 25 are larger than one and included in A186891, thus a(50) = 3.
PROG
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Nov 10 2017
STATUS
approved