%I
%S 0,1,2,4,9,18,36,72,145,291,582,1164,2329,4658,9316,18632,37264,74529,
%T 149059,298118,596236,1192472,2384944,4769888,9539777,19079555,
%U 38159110,76318220,152636440,305272880,610545760,1221091520,2442183041
%N Value of the concatenation of the first n+1 terms of A118605, seen as a binary number.
%C a(n) = 2*a(n1) + A118605(n), a(0) = 0.
%K nonn,base
%O 0,3
%A _Reinhard Zumkeller_, May 09 2006
%E Edited by _Charles R Greathouse IV_, Apr 29 2010
