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A096756 Index of first occurrence of exactly n consecutive twos in a row in the decimal expansion of Pi. 19
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
David G. Andersen, The Pi-Search Page.
EXAMPLE
Pi = 3.1415926... has a "run" of exactly one '2' in the 6th place after the decimal point, therefore a(1) = 6.
CROSSREFS
Sequence in context: A301463 A220064 A050281 * A356505 A241999 A333005
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

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Last modified March 29 06:57 EDT 2024. Contains 371265 sequences. (Running on oeis4.)