A103913 - OEIS

A103913

Numbers n such that 2*P(n)+1, 2*P(n+1)+1, 2*P(n+2)-3, 2*P(n+3)+3 are also consecutive primes with P(i)=i-th prime.

854016, 1668928, 1670977, 2406867, 2835695, 3212701, 3262059, 3678424, 4118273, 4952356

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..10.

PROG

(PARI) isok(n) = {my(p=2*prime(n)+1, q=2*prime(n+1)+1, r=2*prime(n+2)-3, s=2*prime(n+3)+3); isprime(p) && (nextprime(p+1) == q) && (nextprime(q+1) == r) && (nextprime(r+1) == s); } \\ Michel Marcus, Sep 24 2019

CROSSREFS

Cf. A103911, A103912.

Sequence in context: A236978 A209949 A233716 * A151939 A172846 A115546

Adjacent sequences: A103910 A103911 A103912 * A103914 A103915 A103916

KEYWORD

nonn,more

AUTHOR

Pierre CAMI, Feb 21 2005

STATUS

approved