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A076656 a(1) = 2; a(n) is smallest prime > 3*a(n-1). 10
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

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Last modified June 20 19:36 EDT 2019. Contains 324234 sequences. (Running on oeis4.)