OFFSET
1,2
COMMENTS
This is the analog of the sequence of Pisano periods (A001175) for binomial factors.
n^2 always divides a(n).
A prime p is a factor of a(n) if and only if it is a factor of n (i.e., a(n) and n have the same prime factors).
LINKS
Hieronymus Fischer, Table of n, a(n) for n = 1..111
FORMULA
a(n)=n^2 if n is a prime or a power of a prime.
EXAMPLE
CROSSREFS
KEYWORD
nonn
AUTHOR
Hieronymus Fischer, Oct 15 2007, Oct 20 2007
STATUS
approved