A216298 Values of k such that 10k + 9 is the only prime between 10k and 10k + 9.

14, 41, 47, 71, 80, 83, 92, 100, 104, 124, 125, 131, 139, 140, 170, 188, 194, 203, 209, 212, 217, 230, 245, 257, 260, 272, 278, 281, 287, 293, 299, 307, 310, 311, 329, 335, 338, 344, 365, 371, 377, 398, 404, 422, 434, 440, 488, 491, 503, 509, 518, 520, 551

Offset

1,1

Links

V. Raman, Table of n, a(n) for n = 1..10000

Formula

a(n) ~ 0.4 n log n. - Charles R Greathouse IV, Sep 07 2012

Mathematica

t = {}; Do[ps = Select[Range[10*n, 10*n + 9], PrimeQ]; If[ps == {10*n + 9}, AppendTo[t, n]], {n, 0, 677}]; t (* T. D. Noe, Sep 03 2012 *)

Crossrefs

Cf. A032352, A007811, A078494.

Sequence in context: A126368 A125816 A105869 * A056034 A039404 A043227

Adjacent sequences: A216295 A216296 A216297 * A216299 A216300 A216301

Keyword

nonn

Author

V. Raman, Sep 03 2012

Status

approved