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A073055
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a(n) = product of first n digits in the decimal expansion of Pi, ignoring decimal point.
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2
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1, 3, 3, 12, 12, 60, 540, 1080, 6480, 32400, 97200, 486000, 3888000, 34992000, 244944000, 2204496000, 6613488000, 13226976000, 39680928000, 317447424000, 1269789696000, 7618738176000, 15237476352000, 91424858112000, 365699432448000, 1097098297344000
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OFFSET
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0,2
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COMMENTS
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The 33rd digit of Pi is 0, so a(33), a(34), .... = 0. - Philip Bergonio (percyweasley99(AT)yahoo.com), Feb 24 2003
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LINKS
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EXAMPLE
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Pi = 3.141592653589793... so a(0) = 1, a(1) = 3, a(2) = 3*1=3, a(3) = 3*1*4=12, a(4) = 3*1*4*1 = 12 and so on.
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MATHEMATICA
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FoldList[Times, 1, First[RealDigits[N[Pi, 50]]]] (Cunningham)
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CROSSREFS
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KEYWORD
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easy,nonn,base
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AUTHOR
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Y. Kelly Itakura (yitkr(AT)mta.ca), Aug 22 2002
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EXTENSIONS
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Corrected and extended by Gabriel Cunningham (gcasey(AT)mit.edu), Oct 25 2004
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STATUS
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approved
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