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A156155 Numbers n such that prime(prime(n))=2 (mod prime(n)), where prime(n)=A000040(n) is the n-th prime. 3
2, 6, 21, 51892 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

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

FORMULA

a(n) = A000720(A156154(n))

PROG

(PARI) p=c=0; until(0, until( isprime(c++), p=nextprime(p+1)); (p-2)%c & next; print1( primepi(c)", "))

CROSSREFS

Cf. A156154.

Sequence in context: A066932 A181754 A084392 * A263486 A182544 A216120

Adjacent sequences:  A156152 A156153 A156154 * A156156 A156157 A156158

KEYWORD

nonn

AUTHOR

M. F. Hasler, Feb 04 2009

STATUS

approved

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Last modified October 13 16:50 EDT 2019. Contains 327968 sequences. (Running on oeis4.)