A031931 - OEIS

A031931

Upper prime of a difference of 12 between consecutive primes.

211, 223, 479, 521, 631, 673, 809, 1009, 1213, 1249, 1319, 1471, 1511, 1523, 1543, 1721, 1801, 1823, 1901, 2081, 2111, 2309, 2411, 2459, 2591, 2633, 2789, 2939, 3061, 3079, 3181, 3203, 3271, 3343, 3359, 3511, 3571, 3671, 3943, 4001, 4091, 4111, 4409, 4421

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OFFSET

1,1

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..1000

Index entries for primes, gaps between

MATHEMATICA

Select[Partition[Prime[Range[700]], 2, 1], #[[2]]-#[[1]]==12&][[All, 2]] (* Harvey P. Dale, Dec 28 2018 *)

PROG

(PARI) isok(p) = isprime(p) && (p-precprime(p-1) == 12); \\ Michel Marcus, Jun 24 2022

CROSSREFS

Cf. A031925 (difference of 6).