The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A089085 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A089085

Numbers k such that (k! + 3)/3 is prime.
(history; published version)

#31 by Charles R Greathouse IV at Thu Sep 08 08:45:12 EDT 2022

PROG

(MAGMAMagma) [n: n in [0..500] | IsPrime((Factorial(n)+3) div 3)]; // Vincenzo Librandi, Dec 12 2011

Discussion

Thu Sep 08

08:45

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

#30 by Michel Marcus at Mon Aug 30 03:13:28 EDT 2021

STATUS

reviewed

approved

#29 by Joerg Arndt at Mon Aug 30 03:00:59 EDT 2021

STATUS

proposed

reviewed

#28 by Jon E. Schoenfield at Mon Aug 30 02:59:54 EDT 2021

STATUS

editing

proposed

#27 by Jon E. Schoenfield at Mon Aug 30 02:59:43 EDT 2021

NAME

Numbers n k such that (nk! + 3)/3 is prime.

STATUS

approved

editing

#26 by N. J. A. Sloane at Thu Oct 19 10:38:26 EDT 2017

EXTENSIONS

More terms from _Don Reble, _, Dec 06 2003

Discussion

Thu Oct 19

10:38

OEIS Server: https://oeis.org/edit/global/2704

#25 by N. J. A. Sloane at Thu Feb 19 00:06:55 EST 2015

STATUS

proposed

approved

#24 by Serge Batalov at Wed Feb 18 21:10:32 EST 2015

STATUS

editing

proposed

#23 by Serge Batalov at Tue Feb 17 22:51:53 EST 2015

CROSSREFS

Cf. n!/m-1 is a prime: A002982, A082671, A139056, A139199, A139200, A139201, A139202, A139203, A139204, -A139205; n!/m+1 is a prime: A002981, A082672, A089085, A139061, A139058, A139063, A139065, A151913, A137390, A139071 (1<=m<=10).

and n!/m+1 is a prime: A002981, A082672, A089085, A139061, A139058, A139063, A139065, A151913, A137390, A139071 (1<=m<=10).

#22 by Serge Batalov at Tue Feb 17 22:33:02 EST 2015

DATA

3, 5, 6, 8, 11, 17, 23, 36, 77, 93, 94, 109, 304, 497, 1330, 1996, 3027, 3053, 4529, 5841, 20556, 26558, 28167

CROSSREFS

and n!/m+1 is a prime: A002981, A082672, A089085, A139061, A139058, A139063, A139065, A151913, A137390, A139071 (1<=m<=10).

EXTENSIONS

a(21)-a(2223) from Serge Batalov, Feb 17 2015