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

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)

Mathematica

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

Prog

(Magma) [n: n in [0..300] | NthPrime(n+1) - NthPrime(n) eq 4]; // Vincenzo Librandi, Apr 28 2015

Crossrefs

Cf. A023200, A001223.

Sequence in context: A089257 A113451 A270191 * A046458 A096629 A334468

Adjacent sequences: A029706 A029707 A029708 * A029710 A029711 A029712

Keyword

nonn

Author

N. J. A. Sloane

Status

approved