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 A034898 n-th term of A034897 is an a(n)-hyperperfect number. 3
 1, 2, 1, 6, 3, 1, 12, 18, 18, 12, 2, 30, 1, 11, 6, 2, 60, 48, 19, 132, 132, 10, 192, 2, 31, 168, 108, 66, 35, 252, 78, 132, 342, 366, 390, 168, 348, 282, 498, 540, 546, 59, 12, 378, 438, 4, 222, 336, 18, 660, 138, 798, 810, 528, 450, 75, 252, 150, 948, 162 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 REFERENCES R. K. Guy, Unsolved Problems in Number Theory, Sect. B2. Roberts, Lure of the Integers, see Integer 28, p. 177. LINKS Donovan Johnson, Table of n, a(n) for n = 1..10000 Judson S. McCranie, A Study of Hyperperfect Numbers, Journal of Integer Sequences, Vol. 3 (2000), Article 00.1.3. Eric Weisstein's World of Mathematics, Hyperperfect Number. PROG (PARI) forcomposite(n=2, 10^8, if(1==Mod(n, sigma(n)-n-1), print1((n-1)/(sigma(n)-n-1)", "))) \\ Hans Loeblich, May 10 2019 CROSSREFS Cf. A034897. Sequence in context: A060556 A222969 A132813 * A059300 A321331 A046803 Adjacent sequences:  A034895 A034896 A034897 * A034899 A034900 A034901 KEYWORD nonn AUTHOR EXTENSIONS More terms from Donovan Johnson, Nov 20 2012 STATUS approved

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Last modified September 21 02:29 EDT 2020. Contains 337266 sequences. (Running on oeis4.)