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Search: id:A090253
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| A090253 |
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a(1) = 2, a(2) = 3, a(n) = least prime greater than the product of two previous terms. |
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1
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| 2, 3, 7, 23, 163, 3761, 613049, 2305677323, 1413493177187867, 3259059164857285852640107, 4606657893577361399569662402327877981883, 15013370627425459052324121468319040208855976676229499210665181583
(list; graph; listen)
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OFFSET
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1,1
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MAPLE
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a:=proc(n) if n=1 then 2 elif n=2 then 3 else nextprime(a(n-1)*a(n-2)) fi end: seq(a(n), n=1..13); (Deutsch)
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CROSSREFS
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Sequence in context: A077213 A112601 A098544 this_sequence A001064 A108176 A111235
Adjacent sequences: A090250 A090251 A090252 this_sequence A090254 A090255 A090256
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KEYWORD
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nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Nov 27 2003
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EXTENSIONS
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More terms from Emeric Deutsch (deutsch(AT)duke.poly.edu), Feb 26 2005
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