1,1

C. A. Pickover, The Math Book, Sterling, NY, 2009; see p. 90.

Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics

J. M. Pedersen, Known Unitary Amicable Pairs

I. Peterson, Amicable Pairs, Divisors and a New Record

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

R. M. Najar, The Unitary Amicable Pairs To 10^8

Union of A002952 and A002953.

Sequence in context: A057440 A113537 A127664 this_sequence A065118 A095619 A160776

Adjacent sequences: A063988 A063989 A063990 this_sequence A063992 A063993 A063994

nonn

N. J. A. Sloane (njas(AT)research.att.com), Sep 18 2001