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A032683 Numbers n such that n surrounded by digit '3' is a prime. +0
2
1, 5, 7, 8, 16, 20, 25, 31, 32, 34, 37, 41, 43, 46, 53, 58, 59, 61, 62, 64, 67, 73, 79, 80, 82, 83, 85, 86, 92, 94, 101, 103, 106, 112, 115, 118, 119, 122, 125, 133, 139, 151, 154, 157, 158, 164, 166, 172, 179, 187, 188, 196, 197, 200, 206, 208, 214, 217 (list; graph; listen)
OFFSET

1,2

CROSSREFS

Cf. A032687.

Sequence in context: A066001 A047477 A140237 this_sequence A104423 A011347 A117031

Adjacent sequences: A032680 A032681 A032682 this_sequence A032684 A032685 A032686

KEYWORD

nonn,base

AUTHOR

Patrick De Geest (pdg(AT)worldofnumbers.com), May 15, 1998.

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.


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