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A152446 a(0) = 1. a(1) = 2. For n >= 2, a(n) = the largest prime <= a(n-1)*a(n-2). 1
1, 2, 2, 3, 5, 13, 61, 787, 47981, 37761019, 1811811452611, 68415846686461570603, 123956614566609409301849965194431, 8480596737961958410971738003633556174455988528911421 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..13.

MATHEMATICA

a = {1, 2}; Do[AppendTo[a, Prime[PrimePi[a[[ -1]]*a[[ -2]]]]], {9}]; a [From Stefan Steinerberger, Dec 06 2008]

CROSSREFS

A152445

Sequence in context: A065843 A111264 A065994 * A055937 A090255 A228162

Adjacent sequences:  A152443 A152444 A152445 * A152447 A152448 A152449

KEYWORD

nonn,changed

AUTHOR

Leroy Quet, Dec 04 2008

EXTENSIONS

Extended by Ray Chandler and Stefan Steinerberger, Dec 05 2008

STATUS

approved

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Last modified April 20 06:17 EDT 2014. Contains 240779 sequences.