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%I #9 Mar 30 2012 18:51:18
%S 0,1,2,3,4,5,6,7,8,9,20,21,22,23,24,25,26,27,28,29,40,41,42,43,44,45,
%T 46,47,48,49,60,61,62,63,64,65,66,67,68,69,80,81,82,83,84,85,86,87,88,
%U 89,200,201,202,203,204,205,206,207,208,209,220,221,222,223,224,225,226,227
%N n written in fractional base 10/2.
%C To represent a number in base b, if a digit exceeds b, subtract b and carry 1. In fractional base a/b, subtract a and carry b.
%C Also numbers which are written the same in base 20/2 as in base 10. The sequence consists of numbers which have digits in {0,2,4,6,8} except that the unit digit can be any from {0,1,2,3,4,5,6,7,8,9} - _Henry Bottomley_, Nov 17 2000
%C a(n) = A118761(n+1) for n<50. - _Reinhard Zumkeller_, May 01 2006
%Y Cf. A007091, A058185, A058186.
%Y Cf. A102491.
%K nonn,base
%O 0,3
%A _David W. Wilson_
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