A103119 Numbers n such that n0999 is prime.

7, 10, 23, 26, 29, 34, 41, 43, 47, 62, 73, 80, 89, 92, 97, 98, 100, 121, 124, 131, 142, 149, 155, 157, 173, 175, 181, 182, 191, 197, 202, 203, 218, 229, 230, 236, 241, 245, 250, 253, 262, 268, 272, 274, 275, 286, 289, 293, 295, 302, 311, 320, 323, 331, 335, 338

Offset

1,1

Links

Table of n, a(n) for n=1..56.

Example

If n=7, then n0999 = 70999 (prime).
If n=41, then n0999 = 410999 (prime).
If n=80, then n0999 = 800999 (prime).

Mathematica

fQ[n_] := PrimeQ[ FromDigits[ Join[ IntegerDigits[n], {0, 9, 9, 9}]]]; Select[ Range[ 349], fQ[ # ] &] (* Robert G. Wilson v, Mar 26 2005 *)

Crossrefs

Cf. A104153.

Sequence in context: A097634 A120312 A074377 * A054224 A183330 A196316

Adjacent sequences: A103116 A103117 A103118 * A103120 A103121 A103122

Keyword

base,nonn

Author

Parthasarathy Nambi, Mar 16 2005

Extensions

Edited and extended by Robert G. Wilson v, Mar 26 2005

Status

approved