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A277879
Smallest prime r such that p = (q + r + 1)/r, where p = prime(n) and q = A277878(n).
1
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, 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, 7, 2, 13, 5, 5, 3, 2, 5, 11, 3, 3, 5, 3, 5, 2, 2, 2, 11, 2
OFFSET
2,1
COMMENTS
Rassias's conjecture is the claim that q and r exist for every p.
PROG
(PARI) a(n) = my(t=prime(n)-1); forprime(r=2, oo, if(isprime(r*t-1), return(r))); \\ Jinyuan Wang, Jul 25 2021
CROSSREFS
Cf. A277878.
Sequence in context: A174273 A108128 A081326 * A257071 A332025 A212300
KEYWORD
nonn
AUTHOR
Felix Fröhlich, Nov 03 2016
EXTENSIONS
Terms corrected by and more terms from Jinyuan Wang, Jul 25 2021
STATUS
approved