This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A093750 Number of prime pairs below 10^n having a difference of 30. 2
 0, 0, 0, 11, 146, 1914, 21741, 222847, 2177991, 20706430, 194021497, 1803413614, 16694681959, 154292579858, 1425648765821, 13181528127233, 122022749987917, 1131306675851868 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,4 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. EXAMPLE a(5) = 146 because there are 146 prime gaps of 30 below 10^5. CROSSREFS Cf. A007508, A093749, A093751. Sequence in context: A098310 A293610 A061613 * A194726 A296143 A217722 Adjacent sequences:  A093747 A093748 A093749 * A093751 A093752 A093753 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

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified October 20 20:24 EDT 2019. Contains 328273 sequences. (Running on oeis4.)