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 A103119 Numbers n such that n0999 is prime. 0
 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 (list; graph; refs; listen; history; text; internal format)
 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

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Last modified October 2 22:30 EDT 2023. Contains 365841 sequences. (Running on oeis4.)