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A001632 Smallest prime p such that there is a gap of 2n between p and previous prime.
(Formerly M3812 N1560)
+0
9
5, 11, 29, 97, 149, 211, 127, 1847, 541, 907, 1151, 1693, 2503, 2999, 4327, 5623, 1361, 9587, 30631, 19373, 16183, 15727, 81509, 28277, 31957, 19661, 35671, 82129, 44351, 43391, 34123, 89753, 162209, 134581, 173429, 31469, 404671, 212777 (list; graph; listen)
OFFSET

1,1

COMMENT

A001632(n) = 2n+A000230(n) = nextprime(A000230(n)).

REFERENCES

L. J. Lander and T. R. Parkin, On the first appearance of prime differences, Math. Comp., 21 (1967), 483-488.

LINKS

T. D. Noe, Table of n, a(n) for n = 1..595 (from Nicely)

T. R. Nicely, List of prime gaps

Index entries for primes, gaps between

EXAMPLE

The first time a gap of 4 occurs between primes is between 7 and 11, so A000230(2)=7 and A001632(2)=11.

CROSSREFS

Cf. A000230.

Adjacent sequences: A001629 A001630 A001631 this_sequence A001633 A001634 A001635

Sequence in context: A059508 A084817 A100965 this_sequence A053185 A121534 A090119

KEYWORD

nonn,nice,easy

AUTHOR

njas

EXTENSIONS

More terms from Larry Reeves (larryr(AT)acm.org), Nov 28 2000 and from Labos, E., Nov 29, 2000.

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Last modified May 17 13:36 EDT 2008. Contains 139908 sequences.


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