A032666 Digit '3' concatenated with a(n) is a prime.

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

Offset: 1

Author

Patrick De Geest, May 15 1998

Keywords

• nonn
• base

Links

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

Extensions

Edited by Charles R Greathouse IV, Aug 02 2010