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!)
A039070 Numbers whose base-8 representation has the same number of 3's and 7's. 0

%I

%S 0,1,2,4,5,6,8,9,10,12,13,14,16,17,18,20,21,22,31,32,33,34,36,37,38,

%T 40,41,42,44,45,46,48,49,50,52,53,54,59,64,65,66,68,69,70,72,73,74,76,

%U 77,78,80,81,82,84,85,86,95,96,97,98,100,101,102,104,105,106,108,109

%N Numbers whose base-8 representation has the same number of 3's and 7's.

%t Select[Range[200],With[{dc=DigitCount[#,8]},dc[[3]]==dc[[7]]&]] (* _Harvey P. Dale_, Aug 09 2011 *)

%K nonn,base,easy

%O 1,3

%A _Olivier GĂ©rard_

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 16 05:25 EDT 2021. Contains 348035 sequences. (Running on oeis4.)