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Non-superabundant numbers satisfying the reverse of Robin's inequality (A091901).
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%I #13 Mar 20 2013 18:19:00

%S 3,5,8,9,10,16,18,20,30,72,84

%N Non-superabundant numbers satisfying the reverse of Robin's inequality (A091901).

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

%H G. Caveney, J.-L. Nicolas, and J. Sondow, <a href="http://www.integers-ejcnt.org/l33/l33.pdf">Robin's theorem, primes, and a new elementary reformulation of the Riemann Hypothesis</a>, Integers 11 (2011), #A33 (see Table 1).

%H G. Caveney, J.-L. Nicolas and J. Sondow, <a href="http://arxiv.org/abs/1112.6010">On SA, CA, and GA numbers</a>, Ramanujan J., 29 (2012), 359-384.

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

%K nonn

%O 1,1

%A Geoffrey Caveney, Jean-Louis Nicolas, and _Jonathan Sondow_, Jul 11 2011