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Interpret the terms of A069748 having only decimal digits 0 and 1 as binary numbers and then convert those numbers to decimal.
0

%I #10 Mar 30 2012 18:53:00

%S 0,1,3,5,7,9,17,21,27,33,45,51,65,73,99,129,153,165,195,257,273,297,

%T 325,367,513,561

%N Interpret the terms of A069748 having only decimal digits 0 and 1 as binary numbers and then convert those numbers to decimal.

%C May be the same sequence obtained from reading the terms of A002780 having only digits 0,1 in base 2 and converting to decimal.

%e A069748(10)=10101 is the eighth number of A069748 having only digits 0 and 1. The binary number 10101 equals 21 in decimal. Thus a(8)=21.

%Y Cf. A002780.

%K nonn,base

%O 1,3

%A _Vladimir Shevelev_, May 31 2011