

A093975


Number of prime pairs below 10^n having a difference of 42.


2



0, 0, 0, 0, 19, 476, 7180, 86637, 954456, 9919519, 99655858, 979052296, 9484975460, 91050561862, 868774394325, 8257228721817, 78288453457352, 741199448968875
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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), 20332060.


EXAMPLE

a(6) = 476 because there are 476 prime gaps of 42 below 10^6.


CROSSREFS

Cf. A007508, A093974, A093976.
Sequence in context: A284163 A218477 A003700 * A159248 A284220 A201711
Adjacent sequences: A093972 A093973 A093974 * A093976 A093977 A093978


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



