A049523 Smallest starting index for a run of exactly n consecutive equal digits in decimal expansion of Pi.

1, 25, 154, 1590, 17535, 763, 710101, 22931746, 24658602, 386980413, 15647738229, 368299898267, 2164164669333, 5758910552710, 46970519777308

Offset: 1

Author

Harvey P. Dale

Keywords

• nonn
• base
• more

Comments

Digits 3,1,4,1,5,... are indexed 1,2,3,4,5,...

a(11) > 2*10^9. - M. F. Hasler, Mar 22 2017

a(12) > 99*10^9. - Giovanni Resta, Oct 02 2019

a(15) > 12*10^12. - Dmitry Petukhov, Dec 30 2019

a(16) > 50*10^12, a(17) = 28642224609576. - Dmitry Petukhov, Oct 30 2021

Examples

			See A084144 for an example.
		

Links

• Dave Andersen, Pi-Search Page
• Yasumasa Kanada, Statistical Distribution Information, Home page, Computer Centre, The University of Tokyo.
• Timothy Mullican, 50 trillion digits of pi
• PI-world Site, The digits and Statistics for 12 trillion digits of PI [archived page]
• James Taylor, Irrational Number Search Engine
• Peter Trüb, 22.4 trillion digits of pi
• Eric Weisstein's World of Mathematics, Pi Digits.
• Index entries for sequences related to the number Pi

Crossrefs

Cf. A049514, A049515, A049516, A049517, A049518, A049519, A049520, A049521, A049522.

Cf. A084144 (digit with this starting index).

Extensions

More terms from Rick L. Shepherd, May 15 2003

Edited and a(10) (via Taylor's search engine) added by M. F. Hasler, Mar 21 2017

a(11) from Giovanni Resta, Oct 02 2019

a(12)-a(14) added by Dmitry Petukhov, Dec 30 2019

a(15) from Dmitry Petukhov, Oct 30 2021