A093749 Number of prime pairs below 10^n having a difference of 28.

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

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), 2033-2060.

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 A332695 A301307

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