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A096756

Index of first occurrence of exactly n consecutive twos in a row in the decimal expansion of Pi.

6, 135, 1735, 4902, 65260, 963024, 82599811, 175820910, 1270311937, 20717271655, 225023890967, 1479132847647, 5547233660249

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Presently identical to A050281, but it can be expected that the two will eventually differ, namely, as soon as a(n) > a(n+1) and A050281(n) = A050281(n+1).

a(10) > 2*10^9, according to the SubIdiom.com search engine. - M. F. Hasler, Apr 13 2019

a(11) > 99*10^9. - Giovanni Resta, Oct 02 2019

a(14) > 22*10^12. - Dmitry Petukhov, Jan 28 2020

LINKS

Table of n, a(n) for n=1..13.

David G. Andersen, The Pi-Search Page.

Peter Trüb, 22.4 trillion digits of pi

EXAMPLE

Pi = 3.1415926... has a "run" of exactly one '2' in the 6th place after the decimal point, therefore a(1) = 6.

CROSSREFS

Cf. A050281, A035117, A096757, A096758, A096759, A096760, A096761, A096762, A096763, A050279.

Sequence in context: A301463 A220064 A050281 * A386415 A356505 A241999

Adjacent sequences: A096753 A096754 A096755 * A096757 A096758 A096759

KEYWORD

nonn,base,more

AUTHOR

Robert G. Wilson v, Jul 07 2004

EXTENSIONS

a(10) from Giovanni Resta, Oct 02 2019

a(11)-a(13) from Dmitry Petukhov, Jan 14 2020

STATUS

approved

URL: https://oeis.org/A096756

⇱ A096756 - OEIS