A111980 Union of pairs of consecutive primes p, q with q-p = 4.

7, 11, 13, 17, 19, 23, 37, 41, 43, 47, 67, 71, 79, 83, 97, 101, 103, 107, 109, 113, 127, 131, 163, 167, 193, 197, 223, 227, 229, 233, 277, 281, 307, 311, 313, 317, 349, 353, 379, 383, 397, 401, 439, 443, 457, 461, 463, 467, 487, 491, 499, 503, 613, 617, 643

Offset

1,1

Links

Table of n, a(n) for n=1..55.

Mathematica

Flatten[Select[Partition[Prime[Range[200]], 2, 1], #[[2]]-#[[1]]==4&]]//Union (* Harvey P. Dale, Jul 09 2024 *)

Crossrefs

Essentially the same as A094343.

Union of A029710 and A031505.

Cf. A140546.

Sequence in context: A156114 A304690 A091554 * A108811 A038961 A127903

Adjacent sequences: A111977 A111978 A111979 * A111981 A111982 A111983

Keyword

nonn,changed

Author

Ray Chandler, Aug 24 2005

Status

approved