login
This site is supported by donations to The OEIS Foundation.
Logo

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A088762 Numbers n such that (2n-1, 2n+3) is a cousin prime pair. 6
2, 4, 7, 10, 19, 22, 34, 40, 49, 52, 55, 64, 82, 97, 112, 115, 139, 154, 157, 175, 190, 199, 220, 229, 232, 244, 250, 307, 322, 337, 370, 379, 385, 412, 427, 430, 439, 442, 454, 469, 484, 505, 544, 547, 607, 640, 649, 652, 712, 715, 724, 742, 745, 775, 784, 790 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

LINKS

Eric Weisstein's World of Mathematics, Cousin Primes

FORMULA

a(n) = (A087679(n)-1)/2 = (A023200(n)+1)/2 = (A046132(n)-3)/2.

MATHEMATICA

Select[Range[2000], PrimeQ[2*#-1]&&PrimeQ[2*#+3]&](*From Vladimir Joseph Stephan Orlovsky (4vladimir(AT)gmail.com), 26 Dec 2010*)

CROSSREFS

Essentially the same as A111981.

Cf. A087679, A088764, A088766, A088768, A088770.

Sequence in context: A062365 A049630 A032705 * A138827 A173730 A036685

Adjacent sequences:  A088759 A088760 A088761 * A088763 A088764 A088765

KEYWORD

nonn

AUTHOR

Ray Chandler (rayjchandler(AT)sbcglobal.net), Oct 26 2003

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified February 15 14:57 EST 2012. Contains 205823 sequences.