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Revision History for A276992

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Showing entries 1-10 | older changes
First 2-digit number to appear n times in the decimal expansion of Pi.
(history; published version)
#70 by N. J. A. Sloane at Sat Mar 11 05:22:46 EST 2023
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#69 by N. J. A. Sloane at Sat Mar 11 05:22:44 EST 2023
COMMENTS

The fact that 09 is ahead so often is an example of the Arcsine Law Paradox at work. See for example Feller, Volume I, Chapter III. As Feller says, "[the conclusions] are not only unexpected but actually come as a shock to intuition and common sense." Of course the same phenomenon occurs with single digits of Pi, see A0096567, A096567, where 5 seems to be ahead most of the time. - N. J. A. Sloane, Mar 09 2023

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#68 by N. J. A. Sloane at Sat Mar 11 05:02:18 EST 2023
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#67 by N. J. A. Sloane at Sat Mar 11 05:02:15 EST 2023
COMMENTS

The fact that 09 is ahead so often is an example of the Arcsine Law Paradox at work. See for example Feller, Volume I, Chapter III. As Feller says, "[the conclusions] are not only unexpected but actually come as a shock to intuition and common sense." Of course the same phenomenon occurs with single digits of Pi, see A0096567, where 5 seems to be ahead most of the time. - N. J. A. Sloane, Mar 09 2023

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approved

editing

#66 by N. J. A. Sloane at Fri Mar 10 07:37:55 EST 2023
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#65 by N. J. A. Sloane at Fri Mar 10 07:37:53 EST 2023
COMMENTS

The fact that 09 is ahead so often is an example of the Arcsine Law Paradox at work. See for example Feller, Volume I, Chapter III. As Feller says, "[the conclusions] are not only unexpected but actually come as a shock to intuition and common sense." - N. J. A. Sloane, Mar 09 2023

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approved

editing

#64 by N. J. A. Sloane at Thu Mar 09 05:13:04 EST 2023
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editing

approved

#63 by N. J. A. Sloane at Thu Mar 09 05:13:03 EST 2023
COMMENTS

The fact that 09 is ahead so often is an example of the Arcsine Law Paradox at work. See for example Feller, Volume I, Chapter III. - N. J. A. Sloane, Mar 09 2023

REFERENCES

William Feller, An Introduction to Probability Theory and Its Applications, Vol. I, Chapter III, Wiley, 3rd Ed., Corrected printing 1970.

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#62 by N. J. A. Sloane at Thu Mar 09 04:34:39 EST 2023
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approved

#61 by N. J. A. Sloane at Thu Mar 09 04:34:37 EST 2023
COMMENTS

In the first 10000 terms we see "09" 40 times, "14" 33 times, and so on. Here is the complete list:

It does not mean that they do not appear in Pi. Indeed they do. It only means that they are never the first to reach some count. They may be behind by only a small amount. (End)

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