A299172 Primes p such that Ramanujan number tau(p) is divisible by p-1.

2, 3, 59, 107

Offset

1,1

Comments

a(5) > 10^7.

Links

Table of n, a(n) for n=1..4.

Mathematica

Select[ Prime@ Range@ 30, Mod[ RamanujanTau@#, # - 1] == 0 &] (* Robert G. Wilson v, Feb 11 2018 *)

Prog

(PARI) isok(p) = isprime(p) && !(ramanujantau(p) % (p-1)); \\ Michel Marcus, Feb 05 2018

Crossrefs

Cf. A000594, A007659, A299171, A299204, A299205.

Sequence in context: A080052 A157190 A152657 * A154253 A097961 A145556

Adjacent sequences: A299169 A299170 A299171 * A299173 A299174 A299175

Keyword

nonn,more

Author

Seiichi Manyama, Feb 04 2018

Status

approved