%I A084185
%S A084185 1,1,3,8,1,3,17,8,14,4,1,19,3,18,17,8,62,51,14,6,4,1,42,80,19,3,41,18,
%T A084185 40,17,31,8,57,62,128,51,69,20,14,6,104,4,111,66,1,96,42,146,80,50,19,
%U A084185 118,3,77,41,126,18,98,40,17,75,33,31,453,8,57
%N A084185 First occurrence of binary n in the binary expansion of sqrt(2).
%C A084185 a(n)=1 iff n in A084188. a(2^(n+1)+1) = A084187(n)-1.
%e A084185 The binary expansion of sqrt(2) is 1.0110101000001..(A004539) and binary(10)=1010 
               occurs first at index 4, so a(10)=4.
%Y A084185 Cf. A084186.
%Y A084185 Sequence in context: A156827 A140272 A021728 this_sequence A073227 A016550 
               A086245
%Y A084185 Adjacent sequences: A084182 A084183 A084184 this_sequence A084186 A084187 
               A084188
%K A084185 nonn
%O A084185 1,3
%A A084185 Ralf Stephan (ralf(AT)ark.in-berlin.de), May 18 2003