login
This site is supported by donations to The OEIS Foundation.

 

Logo

Annual appeal: Please make a donation to keep the OEIS running! Over 6000 articles have referenced us, often saying "we discovered this result with the help of the OEIS".
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A196147 Bits obtained using Pi and e's digits after the decimal: if, the corresponding digits' parities (cf. even vs. odd) are the same, output is 0; otherwise, output is 1. 1

%I

%S 0,1,1,1,1,1,0,1,1,1,1,0,1,1,0,0,0,1,1,0,0,0,0,0,1,1,0,1,0,1,1,0,0,0,

%T 1,1,0,0,0,1,0,0,1,0,0,1,0,0,0,1,0,1,1,0,0,1,0,0,0,1,1,1,1,0,0,1,0,0,

%U 0,0,1,0,1,1,1,1,0,1,0,0,0,1,1,1,1,1,0,1,1,1

%N Bits obtained using Pi and e's digits after the decimal: if, the corresponding digits' parities (cf. even vs. odd) are the same, output is 0; otherwise, output is 1.

%e For a(1): 1. digit of Pi (after decimal) = 1, 1. digit of e (after decimal) = 7, since parities are the same, a(1) = 0.

%e For a(2): 2. digit of Pi (after decimal) = 4, 2. digit of e (after decimal) = 1, since parities are not the same, a(2) = 1.

%e For a(3): 3. digit of Pi (after decimal) = 1, 3. digit of e (after decimal) = 8, since parities are not the same, a(3) = 1.

%p Digits := 120 ;

%p A196147 := proc(n)

%p ap := floor(10^n*Pi) mod 10 ;

%p ep := floor(10^n*exp(1)) mod 10 ;

%p if (ap mod 2) = (ep mod 2) then

%p 0;

%p else

%p 1;

%p end if;

%p end proc: # _R. J. Mathar_, Sep 28 2011

%t f[n_]:=Mod[RealDigits[N[n,200]][[1]],2];Abs[f[Pi-3]-f[E-2]] (* _Zak Seidov_, Sep 29 2011 *)

%Y Cf. A030657, A071981, A000796, A001113.

%K nonn,less,base

%O 1

%A _Umut Uludag_, Sep 28 2011

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

License Agreements, Terms of Use, Privacy Policy .

Last modified November 18 00:38 EST 2017. Contains 294837 sequences.