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A118721 Chen primes for which the sum of the digits is also a Chen prime. +0
1
2, 3, 5, 7, 11, 23, 29, 41, 47, 67, 83, 89, 101, 113, 131, 137, 139, 157, 179, 191, 197, 199, 227, 263, 269, 281, 311, 317, 337, 353, 359, 379, 401, 409, 443, 449, 461, 467, 487, 557, 571, 577, 599, 641, 647, 683, 719, 751, 797, 809, 821, 827, 829, 863, 881 (list; graph; listen)
OFFSET

1,1

EXAMPLE

29 is in the sequence because (1) it is a Chen prime and (2) the sum of its digits 2+9=11 is also a Chen prime.

CROSSREFS

Cf. A109611.

Sequence in context: A089695 A070027 A118723 this_sequence A094318 A019344 A057459

Adjacent sequences: A118718 A118719 A118720 this_sequence A118722 A118723 A118724

KEYWORD

base,nonn

AUTHOR

Luc Stevens (lms022(AT)yahoo.com), May 21 2006

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Last modified November 18 20:14 EST 2008. Contains 147244 sequences.


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