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A032732 n prefixed by '7' and followed by '9' is a prime. 0
0, 1, 3, 6, 10, 12, 15, 21, 22, 30, 34, 36, 45, 48, 49, 52, 54, 55, 58, 63, 64, 66, 69, 75, 78, 82, 87, 91, 94, 103, 105, 106, 108, 111, 112, 120, 124, 132, 133, 135, 138, 139, 141, 142, 147, 154, 156, 169, 171, 178, 180, 184, 187, 189, 190, 199, 201, 208, 210 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..58.

CROSSREFS

Sequence in context: A007960 A339213 A280243 * A187352 A310044 A157772

Adjacent sequences:  A032729 A032730 A032731 * A032733 A032734 A032735

KEYWORD

nonn,base

AUTHOR

Patrick De Geest, May 15 1998

STATUS

approved

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Last modified September 26 16:15 EDT 2021. Contains 347670 sequences. (Running on oeis4.)