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%I #14 Jul 26 2021 04:51:07
%S 2,2,2,2,2,2,3,2,3,2,2,2,2,3,2,3,3,2,2,5,3,2,3,2,2,5,2,11,2,2,3,2,19,
%T 3,3,2,5,2,5,23,2,2,2,3,3,2,2,3,3,2,11,2,2,5,2,23,3,3,3,2,5,7,2,5,2,2,
%U 7,2,13,5,5,3,2,5,11,3,3,5,3,5,2,2,2,11,2
%N Smallest prime r such that p = (q + r + 1)/r, where p = prime(n) and q = A277878(n).
%C Rassias's conjecture is the claim that q and r exist for every p.
%H Wikipedia, <a href="https://en.wikipedia.org/wiki/Rassias%27_conjecture">Rassias' conjecture</a>.
%o (PARI) a(n) = my(t=prime(n)-1); forprime(r=2, oo, if(isprime(r*t-1), return(r))); \\ _Jinyuan Wang_, Jul 25 2021
%Y Cf. A277878.
%K nonn
%O 2,1
%A _Felix Fröhlich_, Nov 03 2016
%E Terms corrected by and more terms from _Jinyuan Wang_, Jul 25 2021