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A032617 Numbers n such that n concatenated with n + 2 is a prime. +0
3
1, 7, 9, 27, 37, 45, 49, 51, 55, 61, 69, 75, 105, 109, 115, 117, 121, 151, 159, 181, 187, 195, 201, 211, 217, 225, 247, 271, 277, 285, 289, 291, 301, 309, 319, 321, 331, 337, 339, 357, 361, 367, 381, 391, 399, 405, 417, 421, 427, 429, 435, 439 (list; graph; listen)
OFFSET

1,2

CROSSREFS

Cf. A032607.

Sequence in context: A102028 A125260 A104703 this_sequence A113124 A030404 A066930

Adjacent sequences: A032614 A032615 A032616 this_sequence A032618 A032619 A032620

KEYWORD

nonn

AUTHOR

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

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Last modified December 8 08:31 EST 2009. Contains 170430 sequences.


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