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A031939 Upper prime of a difference of 20 between consecutive primes. 1
907, 1657, 3109, 3433, 3967, 5737, 5923, 6007, 6823, 7669, 8263, 8563, 8803, 8887, 9277, 10243, 10453, 10687, 11047, 11113, 11197, 11467, 11617, 11677, 11887, 12007, 13147, 13441, 13669, 14107, 14197, 15493, 16963, 17539, 17827 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..35.

Index entries for primes, gaps between

FORMULA

a(n) = A031938(n)+20.

MATHEMATICA

Prime[Select[Range[2, 5000], Prime[ # ] - Prime[ # - 1] == 20 &]] (* Stefan Steinerberger, May 14 2006 *)

CROSSREFS

Cf. A031937.

Sequence in context: A174862 A195987 A216468 * A253228 A134075 A316679

Adjacent sequences:  A031936 A031937 A031938 * A031940 A031941 A031942

KEYWORD

nonn

AUTHOR

Jeff Burch

STATUS

approved

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Last modified August 10 19:52 EDT 2020. Contains 336381 sequences. (Running on oeis4.)