

A093749


Number of prime pairs below 10^n having a difference of 28.


2



0, 0, 0, 5, 98, 1234, 13255, 129567, 1219243, 11287965, 103578486, 946685407, 8643973155, 78973715102, 722623290887, 6625617932534, 60889631777778, 560938901663498
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OFFSET

1,4


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) = 98 because there are 98 prime gaps of 28 below 10^5.


CROSSREFS

Cf. A007508, A093748, A093750.
Sequence in context: A053980 A215299 A088995 * A197474 A301307 A277418
Adjacent sequences: A093746 A093747 A093748 * A093750 A093751 A093752


KEYWORD

nonn,more


AUTHOR

Enoch Haga, Apr 15 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



