The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A356256 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A356256

The lesser of the 2^n-th twin prime pair (A001359).
(history; published version)

#27 by Sean A. Irvine at Sat Nov 19 14:00:39 EST 2022

STATUS

proposed

approved

#26 by Kevin Ryde at Wed Oct 05 07:21:11 EDT 2022

STATUS

editing

proposed

#25 by Kevin Ryde at Wed Oct 05 07:19:33 EDT 2022

LINKS

Chris K. Caldwell, <a href="http://primes.utm.edu/top20/page.php?id=1">Twin Primes</a>

Chris K. Caldwell, <a href="http://primes.utm.edu/glossary/page.php?sort=TwinPrime">Twin primes</a>

Harvey Dubner, <a href="http://www.emis.de/journals/JIS/VOL8/Dubner/dubner71.html">Twin Prime Statistics</a>, Journal of Integer Sequences, Vol. 8 (2005), Article 05.4.2.

P. Sebah, <a href="http://numbers.computation.free.fr/Constants/Primes/twin.html">Introduction to twin primes and Brun's constant computation</a>

STATUS

proposed

editing

Discussion

Wed Oct 05

07:21

Kevin Ryde: Links dropped on the basis that none address the question of the 2^k'th twin, as far as I can tell.

#24 by Jon E. Schoenfield at Mon Oct 03 21:16:59 EDT 2022

STATUS

editing

proposed

#23 by Jon E. Schoenfield at Mon Oct 03 21:16:52 EDT 2022

NAME

The lesser of the two 2^n-th twin primes prime pair (A001359).

STATUS

proposed

editing

Discussion

Mon Oct 03

21:16

Jon E. Schoenfield: Okay?

#22 by Kevin Ryde at Mon Oct 03 20:18:55 EDT 2022

STATUS

editing

proposed

#21 by Kevin Ryde at Mon Oct 03 20:14:28 EDT 2022

CROSSREFS

Cf. A001359, A014574, A040040, A006512, A001097, A005597, A065421.

Cf. A001359.

STATUS

proposed

editing

Discussion

Mon Oct 03

20:18

Kevin Ryde: Examples is labouring some easy picking of terms.  If you particularly want this then might as well list the first 8 or 9 lesser twins and mark underneath the ones which are the present sequence.  (I'm not sure it adds much, but easier to look.)

#20 by Robert G. Wilson v at Mon Oct 03 14:36:46 EDT 2022

STATUS

editing

proposed

Discussion

Mon Oct 03

19:56

Kevin Ryde: Where abouts in Sebah link does this sequence appear?  There's various material, including 10^k tables which is not this sequence, so should say where the reader is to look.

20:02

Kevin Ryde: where in Harvey Dubner's paper is this sequence?  It's relatively brief, but I don't find.

#19 by Robert G. Wilson v at Mon Oct 03 14:36:42 EDT 2022

EXAMPLE

a(0) = 3 since three 3 is the lesser of the first (2^0) twin prime pair;

a(1) = 5 since five 5 is the lesser of the second (2^1) twin prime pair;

a(2) = 17 since seventeen 17 is the lesser of the fourth (2^2) twin prime pair;

a(3) = 71 since seventy one 71 is the lesser of the eighth (2^3) twin prime pair; etc.

#18 by Robert G. Wilson v at Mon Oct 03 14:34:50 EDT 2022

LINKS

P. Sebah, <a href="http://numbers.computation.free.fr/Constants/Primes/twin.html">Numbers, constants Introduction to twin primes and Brun's constant computation</a>

Discussion

Mon Oct 03

14:35

Robert G. Wilson v: Sorry about the link. I copied it from one of the other CFs. I'll change the "seventy one".