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A119752 a(1)=2; a(n)=first even number greater than a(n-1) such that 2*a(n)+1 is prime and a(i)+a(n)+1 is prime for all 1<=i<=n-1. +0
8
2, 8, 14, 44, 224, 638, 1274, 4004, 675404, 2203958, 3075158, 6195234164, 77989711184, 4566262987328 (list; graph; listen)
OFFSET

1,1

CROSSREFS

Sequence in context: A086177 A162484 A039660 this_sequence A111001 A055258 A054981

Adjacent sequences: A119749 A119750 A119751 this_sequence A119753 A119754 A119755

KEYWORD

more,nonn

AUTHOR

Walter Kehowski (wkehowski(AT)cox.net), Jun 17 2006

EXTENSIONS

a(13),a(14) from Donovan Johnson (donovan.johnson(AT)yahoo.com), Mar 23 2008

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.


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