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A005266 a(1)=3, b(n)=Product_{k=1..n} a(k), a(n+1)=largest prime factor of b(n)-1.
(Formerly M2247) 		+0
39
3, 2, 5, 29, 79, 68729, 3739, 6221191, 157170297801581, 70724343608203457341903, 46316297682014731387158877659877, 78592684042614093322289223662773, 181891012640244955605725966274974474087, 54727558033766416533799014011177216486750803879534719857932653363913270434430183\ 1464707648235639448747816483406685904347568344407941 (list; graph; listen)
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Last modified December 1 13:27 EST 2009. Contains 167806 sequences.

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