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%I #4 Mar 30 2012 18:50:24
%S 5,6,20,22,24,28,31,32,34,37,41,42,49,50,67,68,81,82,84,88,89,93,94,
%T 138,139,140,141,142,143,147,151,157,165,192,194,198,200,202,206,207,
%U 232,236,241,262,265,270,271,284,285,295,301,328,329,332,333,337
%N Numbers n such that n and the n-th prime have the same number of 0's in their binary representation.
%C A023416(a(n))=A023416(A072580(n))=A035103(n);
%C a(n)=A049084(A072580(n)).
%e In binary representation 20 and A000040(20)=71 have three 0's: 13='10100' and 71='1000111', therefore 20 is a term.
%Y Cf. A071600, A072578, A072579.
%K nonn
%O 1,1
%A _Reinhard Zumkeller_, Jun 23 2002
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