Search: id:A143072
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%I A143072
%S A143072 2,4,5,6,9,10,12,16,23,27,29,30,33,34,36,39,40,43,45,46,48,51,53,54,57,
%T A143072 58,60,135,139,141,142,147,149,150,153,154,156,163,165,166,169,170,172,
%U A143072 177,178,180,184,195,197,198,201,202,204,209,210,212,216,225,226,228
%N A143072 A positive integer n is included if both the number of 0's and the number 
               of 1's in the binary representation of n are powers of 2 (including 
               being possibly 1).
%H A143072 Leroy Quet, <a href="http://www.prism-of-spirals.net/">Home Page</a> 
               (listed in lieu of email address)
%e A143072 34 in binary is 100010. This has 4 zeros and 2 ones. And since 4 and 
               2 are both powers of 2, 34 is included in the sequence.
%Y A143072 Cf. A023416, A000120, A143070, A143071.
%Y A143072 Sequence in context: A047435 A132791 A125297 this_sequence A089648 A062861 
               A120629
%Y A143072 Adjacent sequences: A143069 A143070 A143071 this_sequence A143073 A143074 
               A143075
%K A143072 base,nonn
%O A143072 1,1
%A A143072 Leroy Quet Jul 22 2008
%E A143072 Extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Jun 20 2009

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