The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A132190

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A132190

Numbers n such that 7*n^2 + 1 is prime.
(history; published version)

#15 by Michael De Vlieger at Sun Sep 08 19:26:21 EDT 2024

STATUS

reviewed

approved

#14 by Andrew Howroyd at Sun Sep 08 18:40:34 EDT 2024

STATUS

proposed

reviewed

#13 by Robert C. Lyons at Sun Sep 08 18:39:57 EDT 2024

STATUS

editing

proposed

#12 by Robert C. Lyons at Sun Sep 08 18:39:56 EDT 2024

PROG

(Magma) [ n: n in [0..500] | IsPrime(7*n^2 + 1) ] ; // Vincenzo Librandi, Jan 31 2011

STATUS

approved

editing

#11 by Charles R Greathouse IV at Thu Sep 08 08:45:31 EDT 2022

PROG

(MAGMAMagma) [ n: n in [0..500] | IsPrime(7*n^2 + 1) ] // Vincenzo Librandi, Jan 31 2011

Discussion

Thu Sep 08

08:45

OEIS Server: https://oeis.org/edit/global/2944

#10 by Charles R Greathouse IV at Tue Jun 13 10:16:27 EDT 2017

STATUS

editing

approved

#9 by Charles R Greathouse IV at Tue Jun 13 10:16:23 EDT 2017

PROG

(PARI) is(n)=isprime(7*n^2+1) \\ Charles R Greathouse IV, Jun 13 2017

STATUS

approved

editing

#8 by Jon E. Schoenfield at Wed Sep 16 13:53:32 EDT 2015

STATUS

editing

approved

#7 by Jon E. Schoenfield at Wed Sep 16 13:53:31 EDT 2015

MATHEMATICA

Select[Range[300], PrimeQ[7*#^2 + 1] &] - _(* _Stefan Steinerberger_, Jan 02 2008 *)

PROG

(MAGMA) [ n: n in [0..500] | IsPrime(7*n^2 + 1) ] [From // _Vincenzo Librandi, _, Jan 31 2011]

STATUS

approved

editing

#6 by Russ Cox at Fri Mar 30 18:49:46 EDT 2012

MATHEMATICA

Select[Range[300], PrimeQ[7*#^2 + 1] &] - _Stefan Steinerberger (stefan.steinerberger(AT)gmail.com), _, Jan 02 2008

EXTENSIONS

More terms from _Stefan Steinerberger (stefan.steinerberger(AT)gmail.com), _, Jan 02 2008

Discussion

Fri Mar 30

18:49

OEIS Server: https://oeis.org/edit/global/238