The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A103913 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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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.
(history; published version)

#7 by Bruno Berselli at Tue Sep 24 12:16:13 EDT 2019

STATUS

reviewed

approved

#6 by Joerg Arndt at Tue Sep 24 12:11:19 EDT 2019

STATUS

proposed

reviewed

#5 by Michel Marcus at Tue Sep 24 10:58:12 EDT 2019

STATUS

editing

proposed

#4 by Michel Marcus at Tue Sep 24 10:58:08 EDT 2019

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.

KEYWORD

nonn,more

STATUS

approved

editing

#3 by Russ Cox at Sat Mar 31 13:22:03 EDT 2012

AUTHOR

_Pierre CAMI (pierre-cami(AT)bbox.fr), _, Feb 21 2005

Discussion

Sat Mar 31

13:22

OEIS Server: https://oeis.org/edit/global/885

#2 by Charles R Greathouse IV at Thu Dec 01 11:14:19 EST 2011

AUTHOR

Pierre CAMI (pierrecamipierre-cami(AT)tele2bbox.fr), Feb 21 2005

Discussion

Thu Dec 01

11:14

OEIS Server: https://oeis.org/edit/global/101

#1 by N. J. A. Sloane at Wed Feb 23 03:00:00 EST 2005

NAME

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.

DATA

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

OFFSET

1,1

CROSSREFS

Cf. A103911 A103912.

KEYWORD

nonn,new

AUTHOR

Pierre CAMI (pierrecami(AT)tele2.fr), Feb 21 2005

STATUS

approved