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Index of first occurrence of exactly n consecutive '1's in a row in the decimal expansion of Pi.
15

%I #30 Sep 20 2022 02:38:39

%S 1,94,153,12700,32788,255945,4657555,159090113,812432526,3961184001,

%T 15647738228,1041032609981,3907688331257,68635742334547

%N Index of first occurrence of exactly n consecutive '1's in a row in the decimal expansion of Pi.

%C Presently identical to A035117.

%C It would be interesting to know the source for a(10) ~ 4*10^9, since the angio.net web site only searches up to 200M digits of Pi and even on subidiom.com only 2e9 digits of Pi are available. - _M. F. Hasler_, Apr 13 2019

%H David G. Andersen, <a href="http://www.angio.net/pi/piquery">The Pi-Search Page</a>.

%H Yasumasa Kanada, <a href="http://www.super-computing.org/pi-decimal_current.html">Statistical Distribution Information</a>, Home page, Computer Centre, The University of Tokyo.

%H PI-world Site, <a href="https://web.archive.org/web/20140130074648/http://piworld.calico.jp/epidigits.html">The digits and Statistics for 12 trillion digits of PI</a> [archived page]

%H Peter TrĂ¼b, <a href="https://pi2e.ch/blog/2017/03/10/pi-digits-download/">22.4 trillion digits of pi</a>

%Y Cf. A035117, A096756, A096757, A096758, A096759, A096760, A096761, A096762, A096763, A096764.

%K nonn,base,more

%O 1,2

%A _Robert G. Wilson v_, Jul 07 2004

%E a(11) from _Giovanni Resta_, Sep 30 2019

%E a(12) from Yasumasa Kanada, 2002 and a(13) from Shigeru Kondo, 2011, added by _Dmitry Petukhov_, Dec 27 2019

%E a(14) from _Dmitry Petukhov_, Sep 19 2022