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!)
A230597 Numbers n such that (the binary weight of n) = (the ternary weight of n). 1

%I #12 Oct 24 2013 17:28:44

%S 0,1,10,12,13,34,36,37,41,48,49,66,67,68,96,97,120,121,131,132,133,

%T 136,144,145,160,192,193,202,258,259,260,264,265,272,273,282,283,284,

%U 288,289,320,338,340,354,355,356,360,361,368,384,385,390,391,394,418

%N Numbers n such that (the binary weight of n) = (the ternary weight of n).

%H Charles R Greathouse IV, <a href="/A230597/b230597.txt">Table of n, a(n) for n = 1..10000</a>

%F A062756(a(n)) = A000120(a(n)).

%t w[m_]:=Table[Count[IntegerDigits[n,m],1],{n,0,2000}];Position[w[2]-w[3],0]//Flatten

%o (PARI) is(n)=my(v=digits(n,3)); sum(i=1,#v,v[i]==1)==hammingweight(n) \\ _Charles R Greathouse IV_, Oct 24 2013

%Y Cf. A000120, A062756.

%K nonn

%O 1,3

%A _Zak Seidov_, Oct 24 2013

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 April 24 00:30 EDT 2024. Contains 371917 sequences. (Running on oeis4.)