The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A142244 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A142244

Primes congruent to 23 mod 42.
(history; published version)

#11 by Charles R Greathouse IV at Thu Sep 08 08:45:36 EDT 2022

PROG

(MAGMAMagma) [p: p in PrimesUpTo(4000) | p mod 42 eq 23 ]; // Vincenzo Librandi, Aug 24 2012

Discussion

Thu Sep 08

08:45

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

#10 by Charles R Greathouse IV at Sat Jul 02 00:55:25 EDT 2016

STATUS

editing

approved

#9 by Charles R Greathouse IV at Sat Jul 02 00:54:46 EDT 2016

FORMULA

a(n) ~ 12n log n. - Charles R Greathouse IV, Jul 02 2016

PROG

(PARI) is(n)=isprime(n) && n%42==23 \\ Charles R Greathouse IV, Jul 02 2016

STATUS

approved

editing

#8 by Harvey P. Dale at Wed Dec 18 17:51:42 EST 2013

STATUS

editing

approved

#7 by Harvey P. Dale at Wed Dec 18 17:51:39 EST 2013

MATHEMATICA

Select[Range[23, 4000, 42], PrimeQ] (* Harvey P. Dale, Dec 18 2013 *)

STATUS

approved

editing

#6 by Alois P. Heinz at Fri Aug 24 09:50:23 EDT 2012

STATUS

proposed

approved

#5 by Vincenzo Librandi at Fri Aug 24 09:42:11 EDT 2012

STATUS

editing

proposed

#4 by Vincenzo Librandi at Fri Aug 24 09:42:03 EDT 2012

LINKS

Vincenzo Librandi, <a href="/A142244/b142244.txt">Table of n, a(n) for n = 1..1000</a>

MATHEMATICA

Select[Prime[Range[1500]], MemberQ[{23}, Mod[#, 42]]&] (* Vincenzo Librandi, Aug 24 2012 *)

PROG

(MAGMA) [p: p in PrimesUpTo(4000) | p mod 42 eq 23 ]; // Vincenzo Librandi, Aug 24 2012

CROSSREFS

Cf. A000040.

KEYWORD

nonn,easy

STATUS

approved

editing

#3 by Russ Cox at Fri Mar 30 16:50:55 EDT 2012

AUTHOR

_N. J. A. Sloane (njas(AT)research.att.com), _, Jul 11 2008

Discussion

Fri Mar 30

16:50

OEIS Server: https://oeis.org/edit/global/110

#2 by N. J. A. Sloane at Fri Feb 27 03:00:00 EST 2009

KEYWORD

nonn,new

nonn

AUTHOR

N. J. A. Sloane (njas, (AT)research.att.com), Jul 11 2008