1

No value of n is known such that a(n) = -1.

Table of n, a(n) for n=1..82.

J. Alanen, O. Ore and J. Stemple, Systematic computations on amicable numbers, Math. Comp., Vol. 21, No. 98 (1967), 242-245.

Wikipedia, Amicable numbers

Cf. A002025, A002046, A259180.

Sequence in context: A185708 A286996 A275305 * A277145 A295875 A277147

Adjacent sequences: A265754 A265755 A265756 * A265758 A265759 A265760

nonn

Felix FrÃ¶hlich, Dec 15 2015

approved