1,1

All terms are composite numbers. Very few duplicates occur: for the amicable numbers less than 10^14, a number appears at most twice.

T. D. Noe, Table of n, a(n) for n=1..10000

a(n) = A002025(n) / gcd(A002025(n),A002046(n)) = A002025(n) / A061469(n).

Cf. A180327 (non-common part of the larger number of an amicable pair)

Sequence in context: A183320 A185028 A222797 * A119085 A119170 A119228

Adjacent sequences: A180323 A180324 A180325 * A180327 A180328 A180329

nonn

T. D. Noe, Sep 07 2010

approved