A076656 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A076656

a(1) = 2; a(n) is smallest prime > 3*a(n-1).

2, 7, 23, 71, 223, 673, 2027, 6089, 18269, 54829, 164503, 493523, 1480571, 4441721, 13325171, 39975553, 119926691, 359780077, 1079340313, 3238020943, 9714062893, 29142188683, 87426566057, 262279698173, 786839094529

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

OFFSET

1,1

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..1000

MATHEMATICA

PrimeNext[n_]:=Module[{k}, k=n+1; While[ !PrimeQ[k], k++ ]; k]; p=2; lst={p}; Do[p=PrimeNext[3*p]; AppendTo[lst, p], {n, 2*4!}]; lst (* Vladimir Joseph Stephan Orlovsky, May 27 2009 *)

NestList[NextPrime[3#]&, 2, 30] (* Harvey P. Dale, Aug 12 2016 *)

CROSSREFS

Cf. A055496.

Sequence in context: A037488 A129669 A037568 * A085387 A147970 A027139

Adjacent sequences: A076653 A076654 A076655 * A076657 A076658 A076659

KEYWORD

nonn

AUTHOR

Cino Hilliard, Oct 24 2002

EXTENSIONS

Edited by Don Reble, May 03 2006

STATUS

approved