The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A046123

(Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A046123

Third member of a sexy prime quadruple: value of p+12 such that p, p+6, p+12 and p+18 are all prime.
(history; published version)

#27 by Harvey P. Dale at Wed Jan 25 17:48:12 EST 2023

STATUS

editing

approved

#26 by Harvey P. Dale at Wed Jan 25 17:48:09 EST 2023

COMMENTS

Is 17 the only term that is not equal to 3 mod 10? It is the only such term up to the one millionth prime. - Harvey P. Dale, Jan 25 2023

STATUS

approved

editing

#25 by Harvey P. Dale at Wed Jan 25 17:47:54 EST 2023

STATUS

editing

approved

#24 by Harvey P. Dale at Wed Jan 25 17:47:51 EST 2023

COMMENTS

Is 17 the only term that is not equal to 3 mod 10? It is only such term up to the one millionth prime. - ~~~_Harvey P. Dale_, Jan 25 2023

STATUS

approved

editing

#23 by Harvey P. Dale at Wed Jan 25 17:46:06 EST 2023

STATUS

editing

approved

#22 by Harvey P. Dale at Wed Jan 25 17:46:04 EST 2023

COMMENTS

Is 17 the only term that is not equal to 3 mod 10? - ~~~

MATHEMATICA

Select[Prime[Range[3000]], AllTrue[#+{-12, -6, 6}, PrimeQ]&] (* Harvey P. Dale, Jan 25 2023 *)

STATUS

approved

editing

#21 by Bruno Berselli at Fri Apr 22 05:31:15 EDT 2022

STATUS

reviewed

approved

#20 by Michel Marcus at Fri Apr 22 04:15:49 EDT 2022

STATUS

proposed

reviewed

#19 by Amiram Eldar at Fri Apr 22 04:04:38 EDT 2022

STATUS

editing

proposed

#18 by Amiram Eldar at Fri Apr 22 03:50:39 EDT 2022

FORMULA

a(n) = A046122(n) + 6. - Amiram Eldar, Apr 22 2022