login
First member of a prime n-tuplet in a 2p-1 progression.
22

%I #33 Apr 03 2023 10:36:09

%S 2,2,2,1531,1531,16651,16651,15514861,857095381,205528443121,

%T 1389122693971,216857744866621,758083947856951,69257563144280941,

%U 69257563144280941,3203000719597029781

%N First member of a prime n-tuplet in a 2p-1 progression.

%C Initial terms of A000040, A005382, A057326, A057327, A057328, A057329.

%H Dirk Augustin, <a href="http://primerecords.dk/Cunningham_Chain_records.htm#smallest">Smallest existing Cunningham Chains of given length</a>

%H Chris Caldwell, <a href="https://t5k.org/glossary/page.php?sort=CunninghamChain">The Prime Glossary: Cunningham chain</a>

%H Tony Forbes, <a href="https://members.loria.fr/PZimmermann/records/cunningham16">Cunningham Chain of length 16</a>, Dec 05 1997

%H <a href="/index/Pri#primes_AP">Index entries for sequences related to primes in arithmetic progressions</a>

%Y See also A005603. Cf. A179866.

%K nonn,nice,more

%O 1,1

%A _Patrick De Geest_, Aug 15 2000

%E More terms from Jean Gaumont (jeangaum87(AT)yahoo.com), Apr 16 2006

%E Offset corrected by _Max Alekseyev_, May 07 2009

%E a(16) found by Tony Forbes, added by _Jens Kruse Andersen_, Jun 14 2014