A093973 Number of prime pairs below 10^n having a difference of 38.

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

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), 2033-2060.

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 * A345963 A202043 A142549

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