1,1

Butske, W.; Jaje, L.M.; and Mayernik, D.R. "The Equation $ Sum_{p|N}{1/p+1/N}=1$, Pseudoperfect Numbers, and Partially Weighted Graphs." Math. Comput., _69_, 407-420, 1999.

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

Sequence in context: A115961 A123137 A014117 this_sequence A007018 A100016 A000610

Adjacent sequences: A054374 A054375 A054376 this_sequence A054378 A054379 A054380

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Eric Weisstein (eric(AT)weisstein.com)