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A032720 n prefixed by '3' and followed by '7' is a prime. +0
1
0, 1, 3, 4, 6, 9, 13, 16, 18, 21, 25, 30, 34, 40, 45, 46, 51, 52, 54, 55, 60, 61, 63, 67, 69, 72, 76, 79, 84, 87, 90, 91, 94, 96, 114, 117, 123, 124, 126, 127, 130, 132, 133, 135, 138, 139, 147, 151, 154, 156, 160, 162, 165, 166, 168, 172, 181, 184, 190, 195 (list; graph; listen)
OFFSET

0,3

CROSSREFS

Adjacent sequences: A032717 A032718 A032719 this_sequence A032721 A032722 A032723

Sequence in context: A078743 A096846 A140570 this_sequence A090867 A005626 A030712

KEYWORD

nonn,base

AUTHOR

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

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Last modified October 15 20:07 EDT 2008. Contains 145015 sequences.


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