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A248862 Primes p such that 900*p^2 is in the sequence A248861. 1
2, 47, 59, 89, 173, 55439, 561599, 19824479 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..8.

MATHEMATICA

lastP=2; lst={2}; While[lastP<200, If[

Mod[EulerPhi[900*NextPrime[lastP]^2]^EulerPhi[900*NextPrime[lastP]^2], DivisorSigma[1, 900*NextPrime[lastP]^2]]==1,

AppendTo[lst, NextPrime[lastP]]]; lastP=NextPrime[lastP]]; lst (* Ivan N. Ianakiev, Dec 15 2014 *)

CROSSREFS

Cf. A000040, A248861.

Sequence in context: A141579 A107205 A139839 * A118104 A107211 A069548

Adjacent sequences:  A248859 A248860 A248861 * A248863 A248864 A248865

KEYWORD

nonn,more

AUTHOR

Farideh Firoozbakht, Dec 12 2014

STATUS

approved

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Last modified August 8 11:31 EDT 2020. Contains 336298 sequences. (Running on oeis4.)