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%I #7 Apr 03 2023 10:36:11
%S 2131,2311,6211,7411,10321,18121,22531,23011,24391,29671,31771,35311,
%T 41491,46411,54601,56311,60331,61381,67651,78031,85381,96931,99871,
%U 109471,126001,134731,156691,162451,165331,170851,185131,205171,224401
%N Smallest primes starting a complete three iterations Cunningham chain of the second kind.
%C The word "complete" indicates each chain is exactly 4 primes long (i.e., the chain cannot be a subchain of another one). Other sequences give also primes included in longer chains ("starting" them or not).
%C Terms computed by Gilles Sadowski.
%H Chris Caldwell's Prime Glossary, <a href="https://t5k.org/glossary/page.php?sort=CunninghamChain">Cunningham chains</a>.
%e 2311 is here because, through the operator <*2-1> of the chains of the second kind,
%e 2311 -> 4621 -> 9241 -> 18481 and the chain ends here (with this operator).
%Y Cf. A023272, A023302, A023330, A005384, A005385, A059452, A059455, A007700
%Y Cf. A059759, A059760, A059761, A059762, A059763, A059764, A059765, A038397, A104349, A091314, A069362, A016093, A014937, A057326.
%K easy,nonn
%O 1,1
%A _Alexandre Wajnberg_, Sep 03 2005
%E Edited and extended by _R. J. Mathar_, May 08 2009
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