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A032666 Digit '3' concatenated with a(n) is a prime. 4
1, 7, 11, 13, 17, 31, 37, 47, 49, 53, 59, 67, 73, 79, 83, 89, 97, 109, 119, 121, 137, 163, 167, 169, 181, 187, 191, 203, 209, 217, 221, 229, 251, 253, 257, 259, 271, 299, 301, 307, 313, 319, 323, 329, 331, 343, 347, 359, 361, 371, 373, 389, 391 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Seiichi Manyama, Table of n, a(n) for n = 1..10000

CROSSREFS

Sequence in context: A191035 A038877 A019351 * A237183 A153321 A060772

Adjacent sequences:  A032663 A032664 A032665 * A032667 A032668 A032669

KEYWORD

nonn,base

AUTHOR

Patrick De Geest, May 15 1998

EXTENSIONS

Edited by Charles R Greathouse IV, Aug 02 2010

STATUS

approved

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Last modified September 21 23:10 EDT 2020. Contains 337274 sequences. (Running on oeis4.)