A029709 - OEIS

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A029709

Numbers k such that k-th and (k+1)st primes differ by 4.

4, 6, 8, 12, 14, 19, 22, 25, 27, 29, 31, 38, 44, 48, 50, 59, 63, 65, 70, 75, 78, 85, 88, 90, 93, 95, 112, 117, 122, 131, 134, 136, 143, 147, 149, 151, 153, 155, 159, 163, 169, 181, 183, 198, 207, 211, 213, 224, 226, 229, 235, 237, 244, 247, 249, 251

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

OFFSET

1,1

COMMENTS

Positions of 4 in A001223. - Zak Seidov, Apr 28 2015

LINKS

N. J. A. Sloane and K. D. Bajpai, Table of n, a(n) for n = 1..10213 (first 56 terms from N. J. A. Sloane)

FORMULA

A029710(n) = prime(a(n)). - R. J. Mathar, Apr 30 2024

MATHEMATICA

Select[Range[2, 300], 4 == (Prime[# + 1] - Prime[#]) &] (* Vincenzo Librandi, Apr 28 2015 *)

PROG