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A032671 Digit '8' concatenated with a(n) is a prime. 4
3, 9, 11, 21, 23, 27, 29, 39, 53, 57, 59, 63, 77, 81, 83, 87, 101, 111, 117, 123, 147, 161, 167, 171, 179, 191, 209, 219, 221, 231, 233, 237, 243, 263, 269, 273, 287, 291, 293, 297, 311, 317, 329, 353, 363, 369, 377, 387, 389, 419, 423, 429, 431, 443, 447 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
CROSSREFS
Sequence in context: A004626 A110999 A179867 * A370918 A331029 A105949
KEYWORD
nonn,base
AUTHOR
Patrick De Geest, May 15 1998
STATUS
approved

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Last modified April 23 16:40 EDT 2024. Contains 371916 sequences. (Running on oeis4.)