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A064903 Semiprimes p1*p2 such that p2 mod p1 = 5. 1
133, 329, 403, 427, 623, 721, 781, 817, 917, 1079, 1211, 1241, 1417, 1507, 1603, 1799, 1819, 1897, 1991, 2077, 2191, 2231, 2681, 2779, 2923, 2959, 2983, 3073, 3107, 3269, 3443, 3563, 3661, 4121, 4151, 4169, 4249, 4411, 4427, 4709, 4739, 4837, 5033 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Harvey P. Dale, Table of n, a(n) for n = 0..1000

MATHEMATICA

sp5Q[n_]:=Module[{f=Transpose[FactorInteger[n]][[1]]}, Mod[Last[f], First[ f]] == 5]; Select[Range[5500], PrimeOmega[#]==2&&sp5Q[#]&] (* Harvey P. Dale, Aug 12 2014 *)

CROSSREFS

Cf. A001358 (p2 mod p1 = 0), A064899-A064911.

Sequence in context: A146181 A105984 A115518 * A259638 A070158 A055940

Adjacent sequences:  A064900 A064901 A064902 * A064904 A064905 A064906

KEYWORD

nonn

AUTHOR

Patrick De Geest, Oct 13 2001.

STATUS

approved

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Last modified May 26 15:29 EDT 2019. Contains 323597 sequences. (Running on oeis4.)