1,1

Let f(n) = 1 + sum of aliquot divisors of n; these are pairs (n,m) with f(n)=m, f(m)=n.

D. Moews, Augmented amicable pairs

J. O. M. Pedersen, Tables of Aliquot Cycles

Cf. A007992.

Sequence in context: A049051 A154053 A151600 this_sequence A045307 A046192 A031868

Adjacent sequences: A015627 A015628 A015629 this_sequence A015631 A015632 A015633

nonn,nice

N. J. A. Sloane (njas(AT)research.att.com).