A093974 Number of prime pairs below 10^n having a difference of 40.
0, 0, 0, 0, 28, 424, 5318, 60761, 648780, 6576432, 64778166, 626694626, 5994718578, 56938020205, 538418118750, 5078038454782, 47824516913862, 450132198653881
Offset: 1
Examples
a(5) = 28 because there are 28 prime gaps of 40 below 10^5.
Links
- 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.
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