%I #10 Oct 14 2023 21:10:09
%S 2,3,4,5,6,7,8,9,12,15,18,21,24,30,45,105
%N Numbers m such that all odd numbers k, 1 < k < m, relatively prime to m are primes.
%C Joe Roberts writes that it is an assertion of Cseh that 105 is the last term. This sequence appears to be the same as A141109/2. - _T. D. Noe_, Jun 03 2008
%D J. Roberts, Lure of the Integers, Math. Assoc. America, 1992, p. 219.
%D L. Cseh, Generalized integers and Bonse's theorem, Studia Univ. Babes-Bolyai Math. 34 (1989), 3-6.
%e 15 is in this sequence because the odd numbers in [3,13] relatively prime to 15 are 7, 11 and 13, which are all prime.
%K nonn,fini,full
%O 1,1
%A _N. J. A. Sloane_
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