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A192884 Non-superabundant numbers satisfying the reverse of Robin's inequality (A091901). 1
3, 5, 8, 9, 10, 16, 18, 20, 30, 72, 84 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

If another term exists, it is > 5040 and the Riemann Hypothesis is false.

LINKS

Table of n, a(n) for n=1..11.

G. Caveney, J.-L. Nicolas, and J. Sondow, Robin's theorem, primes, and a new elementary reformulation of the Riemann Hypothesis, Integers 11 (2011), #A33 (see Table 1).

G. Caveney, J.-L. Nicolas and J. Sondow, On SA, CA, and GA numbers, Ramanujan J., 29 (2012), 359-384.

CROSSREFS

Cf. A004394 (superabundant), A091901 (Robin's inequality), A067698 (the reverse of Robin's inequality), A189686 (superabundant and the reverse of Robin's inequality).

Sequence in context: A189127 A189288 A190205 * A134427 A065347 A085722

Adjacent sequences:  A192881 A192882 A192883 * A192885 A192886 A192887

KEYWORD

nonn

AUTHOR

Geoffrey Caveney, Jean-Louis Nicolas, and Jonathan Sondow, Jul 11 2011

STATUS

approved

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Last modified October 20 16:07 EDT 2021. Contains 348111 sequences. (Running on oeis4.)