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A073055 a(n) = product of first n digits in the decimal expansion of Pi, ignoring decimal point. 2
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

The 33rd digit of Pi is 0, so a(33), a(34), .... = 0. - Philip Bergonio (percyweasley99(AT)yahoo.com), Feb 24 2003

LINKS

Alois P. Heinz, Table of n, a(n) for n = 0..100

EXAMPLE

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.

MATHEMATICA

FoldList[Times, 1, First[RealDigits[N[Pi, 50]]]] (Cunningham)

CROSSREFS

Cf. A000796.

Sequence in context: A032308 A117856 A074850 * A075780 A292515 A078666

Adjacent sequences:  A073052 A073053 A073054 * A073056 A073057 A073058

KEYWORD

easy,nonn,base

AUTHOR

Y. Kelly Itakura (yitkr(AT)mta.ca), Aug 22 2002

EXTENSIONS

Corrected and extended by Gabriel Cunningham (gcasey(AT)mit.edu), Oct 25 2004

STATUS

approved

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Last modified September 28 13:24 EDT 2020. Contains 337393 sequences. (Running on oeis4.)