A032672 Digit '9' concatenated with a(n) is a prime.

7, 11, 19, 29, 37, 41, 47, 53, 67, 71, 77, 83, 91, 97, 103, 109, 127, 133, 137, 151, 157, 161, 173, 181, 187, 199, 203, 209, 221, 227, 239, 241, 257, 277, 281, 283, 293, 311, 319, 323, 337, 341, 343, 349, 371, 377, 391, 397, 403, 413, 419, 421, 431, 433

Offset

1,1

Links

Seiichi Manyama, Table of n, a(n) for n = 1..10000 (terms 1..1001 from Harvey P. Dale)

Mathematica

Select[Range[500], PrimeQ[FromDigits[Join[{9}, IntegerDigits[#]]]]&] (* Harvey P. Dale, Dec 13 2011 *)

Crossrefs

Sequence in context: A141337 A192187 A053403 * A235806 A238501 A133425

Adjacent sequences: A032669 A032670 A032671 * A032673 A032674 A032675

Keyword

nonn,base

Author

Patrick De Geest, May 15 1998

Status

approved