A167292 Primes containing 999 as a substring.

1999, 2999, 4999, 8999, 13999, 19991, 19993, 19997, 25999, 32999, 35999, 41999, 49991, 49993, 49999, 52999, 56999, 59999, 69991, 69997, 70999, 71999, 73999, 77999, 79997, 79999, 85999, 94999, 98999, 99901, 99907, 99923, 99929, 99961

Offset

1,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

Mathematica

p999Q[n_] := Module[{idn=IntegerDigits[n]}, MemberQ[Partition[idn, 3, 1], {9, 9, 9}]]; Select[Prime[Range[10000]], p999Q] (* Vincenzo Librandi, Sep 15 2013 *)

Crossrefs

Superset of A230202.

Cf. A166571, A166572, A166573, A166579.

Cf. A243527, A166580, A166581, A166582, A167281, A167282, A167290.

Sequence in context: A253744 A253751 A031808 * A230202 A037029 A048517

Adjacent sequences: A167289 A167290 A167291 * A167293 A167294 A167295

Keyword

nonn,base

Author

Vincenzo Librandi, Nov 01 2009

Status

approved