1,1

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.

Cf. A007593.

Sequence in context: A004225 A004226 A070192 this_sequence A145123 A068258 A075407

Adjacent sequences: A028496 A028497 A028498 this_sequence A028500 A028501 A028502

nonn

Jud McCranie (j.mccranie(AT)comcast.net)