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A126031
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a(n) is largest prime < 3*a(n-1).
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1
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2, 5, 13, 37, 109, 317, 947, 2837, 8501, 25471, 76403, 229199, 687593, 2062759, 6188263, 18564769, 55694299, 167082893, 501248653, 1503745949, 4511237741, 13533713213, 40601139629, 121803418861, 365410256543, 1096230769619
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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LINKS
| Artur Jasinski (grafix(AT)csl.pl), Dec 16 2006, Table of n, a(n) for n = 1..40
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MATHEMATICA
| NestList[NextPrime[3#, -1]&, 2, 30] (* From Harvey P. Dale, Feb 03 2012 *)
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CROSSREFS
| Cf. A006902, A040016.
Sequence in context: A019268 A005961 A036249 * A151416 A193114 A114509
Adjacent sequences: A126028 A126029 A126030 * A126032 A126033 A126034
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KEYWORD
| nonn,changed
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AUTHOR
| Artur Jasinski (grafix(AT)csl.pl), Dec 16 2006
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