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!)
A105362 Rearrangement of positive integers according to decimal expansions of Pi and e (see comments). 1

%I

%S 1,2,3,4,5,7,9,6,11,8,13,15,17,19,21,10,23,25,27,29,31,33,35,12,14,16,

%T 37,39,18,41,43,20,22,45,47,24,26,28,49,51,30,53,55,57,59,61,32,34,36,

%U 38,40,42,63,44,46,65,67,48,69,50,52,54,71,56,58,60,73,75,62,77,64,66

%N Rearrangement of positive integers according to decimal expansions of Pi and e (see comments).

%C Take decimal expansions of Pi and e: p=3,1,4,1,5,9,2,6,5,... e=2,1,4,3,6,8,10,5,12,... If p(n)<e(n) then a(n) is the next even number otherwise a(n) is the next odd number.

%t re=RealDigits[N[Pi, 200]][[1]];ee=RealDigits[N[E, 200]][[1]];bb={};od=-1;ev=0;Do[If[re[[i]]<ee[[i]], ev=ev+2;bb=Append[bb, ev], od=od+2;bb=Append[bb, od]], i, 200}];bb

%Y Cf. A105361.

%K nonn,base

%O 1,2

%A _Zak Seidov_, Apr 01 2005

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 February 26 09:46 EST 2020. Contains 332277 sequences. (Running on oeis4.)