A169682 Golomb-type sequence over primes.

2, 2, 3, 3, 5, 5, 5, 7, 7, 7, 11, 11, 11, 11, 11, 13, 13, 13, 13, 13, 17, 17, 17, 17, 17, 19, 19, 19, 19, 19, 19, 19, 23, 23, 23, 23, 23, 23, 23, 29, 29, 29, 29, 29, 29, 29, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37

Offset

1,1

Comments

Suggested by Golomb's sequence A001462.

Terms are primes in nondecreasing order; a(n) gives length of n-th run.

It is understood that a(n) is taken to be the smallest number >= a(n-1) which is compatible with the description.

Links

Ivan Neretin, Table of n, a(n) for n = 1..10000

Mathematica

a = {2, 2}; Do[a = Join[a, Array[Prime[i]&, a[[i]]]], {i, 2, 12}]; a (* Ivan Neretin, Apr 03 2015 *)

Crossrefs

Cf. A001462.

Sequence in context: A059974 A045767 A108221 * A082524 A099961 A286107

Adjacent sequences: A169679 A169680 A169681 * A169683 A169684 A169685

Keyword

nonn

Author

N. J. A. Sloane, following a posting to the Sequence Fans mailing list by Eric Angelini, Apr 13 2010

Status

approved