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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 (list; graph; refs; listen; history; text; internal format)
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(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

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Last modified July 25 12:15 EDT 2021. Contains 346290 sequences. (Running on oeis4.)