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A032719 Numbers n such that n prefixed by '2' and followed by '7' is prime. +0
1
2, 5, 7, 13, 20, 23, 26, 28, 29, 34, 35, 37, 41, 43, 44, 46, 47, 55, 61, 64, 65, 67, 68, 70, 76, 77, 79, 83, 85, 88, 89, 91, 92, 95, 101, 106, 110, 115, 118, 122, 124, 127, 131, 134, 137, 139, 140, 146, 148, 151, 155, 157, 158, 161, 164, 172, 173, 175, 176 (list; graph; listen)
OFFSET

1,1

CROSSREFS

Sequence in context: A094743 A056985 A082182 this_sequence A045355 A165319 A094712

Adjacent sequences: A032716 A032717 A032718 this_sequence A032720 A032721 A032722

KEYWORD

nonn,base

AUTHOR

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

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Last modified December 17 23:40 EST 2009. Contains 171025 sequences.


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