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A193940 Starting position of the first occurrence of the decimal number 10^n in the decimal expansion of Pi. 2
1, 49, 854, 854, 387791, 2393355, 10359802, 13310435, 172330849, 2542542101 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..9.

EXAMPLE

Pi = 3.141592653589793238462643383279502884197169399375105.. The '1' (10^0) after the decimal point is at position 1. The '1' of the first occurrence of '10' (10^1) is at position 49.

MATHEMATICA

str = ToString[N[Pi-3, 2*10^8]]; s = "1"; Table[pos = StringPosition[str, s, 1][[1, 1]] - 2; s = s <> "0"; pos, {9}] (* this code takes a long time. T. D. Noe, Aug 10 2011 *)

CROSSREFS

Cf. A000796, A176341, A194351.

Sequence in context: A289992 A278284 A110906 * A012115 A284642 A304046

Adjacent sequences:  A193937 A193938 A193939 * A193941 A193942 A193943

KEYWORD

nonn,base

AUTHOR

Kausthub Gudipati, Aug 10 2011

EXTENSIONS

Edited by Hans Havermann, Jul 21 2014

a(9) from Hans Havermann, Jul 21 2014

STATUS

approved

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Last modified July 16 12:19 EDT 2019. Contains 325079 sequences. (Running on oeis4.)