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A088762
Numbers n such that (2n-1, 2n+3) is a cousin prime pair.
7
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
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]&] (* Vladimir Joseph Stephan Orlovsky, Dec 26 2010 *)
PROG
(Magma) [n: n in [1..1000] |IsPrime(2*n-1) and IsPrime(2*n+3)]; // Vincenzo Librandi, May 19 2017
CROSSREFS
Essentially the same as A111981.
Sequence in context: A281168 A274352 A343328 * A217385 A138827 A353055
KEYWORD
nonn
AUTHOR
Ray Chandler, Oct 26 2003
STATUS
approved