

A093973


Number of prime pairs below 10^n having a difference of 38.


2



0, 0, 0, 0, 19, 330, 4498, 51756, 548746, 5517814, 54024702, 520188423, 4957098874, 46933220241, 442604975423, 4164551600019, 39140839016528, 367734226199966
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OFFSET

1,5


LINKS

Table of n, a(n) for n=1..18.
Siegfried "Zig" Herzog, Frequency of Occurrence of Prime Gaps
T. Oliveira e Silva, S. Herzog, and S. Pardi, Empirical verification of the even Goldbach conjecture and computation of prime gaps up to 4.10^18, Math. Comp., 83 (2014), 20332060.


EXAMPLE

a(5) = 19 because there are 19 prime gaps of 38 below 10^5.


CROSSREFS

Cf. A007508, A093972, A093974.
Sequence in context: A098304 A014900 A121324 * A202043 A142549 A049629
Adjacent sequences: A093970 A093971 A093972 * A093974 A093975 A093976


KEYWORD

nonn,more


AUTHOR

Enoch Haga, Apr 24 2004


EXTENSIONS

a(10)a(13) from Washington Bomfim, Jun 22 2012
a(14)a(18) from S. Herzog's website added by Giovanni Resta, Aug 14 2018


STATUS

approved



