1,1

J.-M. De Koninck, Ces nombres qui nous fascinent, Entry 21, pp 7, Ellipses, Paris 2008.

R. K. Guy, Unsolved Problems in Number Theory, B2.

Daniel Minoli, Sufficient Forms For Generalized Perfect Numbers, Ann. Fac. Sciences, Univ. Nation. Zaire, Section Mathem; Vol. 4, No. 2, Dec 1978, pp. 277-302.

Daniel Minoli, New Results For Hyperperfect Numbers, Abstracts American Math. Soc., October 1980, Issue 6, Vol. 1, pp. 561.

Daniel Minoli, Issues in non-linear hyperperfect numbers, Math. Comp., 34 (1980), 639-645.

Daniel Minoli, Structural Issues For Hyperperfect Numbers, Fibonacci Quarterly, Feb. 1981, Vol. 19, No. 1, pp. 6-14.

Daniel Minoli, Voice Over MPLS, McGraw-Hill, 2002, New York, NY, see pp. 112-134.

Daniel Minoli and Robert Bear, Hyperperfect Numbers, PME Journal, Fall 1975, pp. 153-157.

Daniel Minoli and W. Nakamine, Mersenne Numbers Rooted On 3 For Number Theoretic Transforms, 1980 IEEE International Conf. on Acoust., Speech and Signal Processing.

J. Roberts, Lure of the Integers, Math. Assoc. America, 1992, p. 177.

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

J. S. McCranie, A study of hyperperfect numbers, J. Int. Seqs. Vol. 3 (2000) #P00.1.3

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

Sequence in context: A130039 A163928 A153848 this_sequence A119099 A033510 A123844

Adjacent sequences: A007590 A007591 A007592 this_sequence A007594 A007595 A007596

nonn,hard

N. J. A. Sloane (njas(AT)research.att.com), David W. Wilson (davidwwilson(AT)comcast.net)

328256967373616371221, 67585198634817522935331173030319681, 443426488243037769923934299701036035201 are also in the sequence - Jud McCranie (j.mccranie(AT)comcast.net), Dec 16 1999