login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A064810 Self-locating strings in Pi using zero-based indexing. 4
6, 27, 13598, 43611, 24643510, 71683711, 78714901, 268561754, 4261759184, 82638677082, 548535559133 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

a(12) is greater than 10^12. - Alan Eliasen, Jun 17 2013

LINKS

Table of n, a(n) for n=1..11.

Dave Andersen, The Pi-Search Page

Tom Crawford and Brady Haran, Strings and Loops within Pi, Numberphile video (2020).

Brady Haran and Katie Steckles, 27 the Favourite Number, Numberphile video (2012).

L. Brandon Stone, 27 and the Number Pi

EXAMPLE

6 is the first term because Pi is 3.1415926... and the digit 6 is in position 6 after the decimal point when the first 1 after the decimal point is considered to be at position 0.

MATHEMATICA

Do[If[RealDigits[Pi, 10, a=i+IntegerLength@i-1, -2][[1, i;; a]]==IntegerDigits@i, Print@i], {i, 50000}] (* Giorgos Kalogeropoulos, Feb 21 2020 *)

CROSSREFS

Cf. A000796, A057679, A057680.

Sequence in context: A048436 A276412 A006174 * A101454 A091911 A215896

Adjacent sequences:  A064807 A064808 A064809 * A064811 A064812 A064813

KEYWORD

base,nonn,more

AUTHOR

Klaus Strassburger (strass(AT)ddfi.uni-duesseldorf.de), Oct 22 2001

EXTENSIONS

a(6)-a(10) from Alan Eliasen, May 11 2013

a(11) from Alan Eliasen, May 28 2013

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 20 19:08 EDT 2020. Contains 337906 sequences. (Running on oeis4.)