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A169682 Golomb-type sequence over primes. 2
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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified May 28 07:57 EDT 2017. Contains 287212 sequences.