The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A205648 Self-locating strings within e: numbers n such that the string n is at position n (after the decimal point) in decimal digits of e. 2

%I #18 Aug 19 2013 03:55:18

%S 338,2543,91668,170596,420297,33909384

%N Self-locating strings within e: numbers n such that the string n is at position n (after the decimal point) in decimal digits of e.

%C a(7) is greater than 10^9.

%C Heuristically (assuming e is 10-normal and in the absence of any 'conspiracy' amongst the digits) about 1 - exp(-0.9) = 59.3...% of the time there is some d-digit number in this sequence, and a(n) is on the order of 12.9...^(n + o(1)). [_Charles R Greathouse IV_, Mar 16 2012]

%H Jingwei Liu and Yongzhi Pan, <a href="https://github.com/th507/Slopi">Slopi</a>

%o (C) See Liu & Pan link.

%Y Cf. A001113.

%Y Similar to A057680 (self-locating strings within Pi).

%K nonn,base,more

%O 1,1

%A _Jingwei Liu_, Jan 30 2012

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 23 05:59 EDT 2024. Contains 372758 sequences. (Running on oeis4.)