cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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A093777 a(n) is the smallest prime which, if used to start a Euclid-Mullin sequence (like A000945), the resulting sequence contains the n consecutive primes 2, 3, ..., prime(n).

Original entry on oeis.org

2, 2, 19, 199, 2089, 99109, 1960969, 10129129, 87726649, 4549584049, 328034245549, 20584643748679, 666188861477149, 31395465477725359, 894857713367947339, 434392154438254391389, 17934770256689308411399
Offset: 1

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Author

Labos Elemer, May 03 2004

Keywords

Comments

Thanks in part to Dirichlet's theorem, a(n) exists for each n. - Don Reble, Oct 07 2006

Examples

			a(1) = a(2) = 2 because they generate {2,3,7,43,13,...};
a(3) = 19 because it generates {19,2,3,5,571,271,...}, see A051312;
a(4) = 199 because it generates {199,2,3,5,7,23,881,...};
a(5) = 2089 because it generates {2089,2,3,5,7,11,269,...};
a(6) = 99109 because it generates {99109,2,3,5,7,11,13,2976243271,...};
a(7) = 1960969 because it generates {1960969,2,3,5,7,11,13,17,281,47,419,5539788476533581271,37,19,173,...}
		

Crossrefs

Extensions

More terms from Don Reble, Oct 07 2006

A093780 a(n) is the smallest prime used as initial value for Euclid-Mullin (EM) sequence (of variant A000945), such that in the corresponding EM-sequence the p=3 prime arises at the n-th position.

Original entry on oeis.org

3, 2, 7, 5, 59, 479, 821, 1871, 17393, 43019, 284783, 1572149, 2737793, 32938853, 24254639
Offset: 1

Views

Author

Labos Elemer, May 03 2004

Keywords

Examples

			p=3 arises first as n-th term for n=1,2,3,4,...,9th as follows:
{3,2,7,43,13,53,5},{2,3,7,43,13,53,5},{7,2,3,43,13,53,5},
{5,2,11,3,331,19},{269,2,7,3767,3,42559567},{479,2,7,19,5,3},
{821,2,31,109,7,509,3},{1871,2,19,7,37,13,23,3},
{17393,2,43,37,7,4129,13,5,3},
		

Crossrefs

Extensions

More terms from David Wasserman, Apr 12 2007
Showing 1-2 of 2 results.