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A self-describing sequence: there are a(n) even digits and a(n) odd digits in the interval ]0;a(n)+1[.
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%I #4 Mar 31 2012 13:46:52

%S 10,10,10,10,10,10,10,10,10,10,12,12,14,14,16,16,18,18,21,21,21,23,23,

%T 25,25,27,27,29,29,30,32,32,34,34,36,36,38,38,41,41,41,43,43,45,45,47,

%U 47,49,49,50,52,52,54,54,56,56,58,58,61,61,61,63,63,65,65,67,67,69,69

%N A self-describing sequence: there are a(n) even digits and a(n) odd digits in the interval ]0;a(n)+1[.

%e Pick the first "10" of the sequence; there are 10 even digits and 10 odd digits in the interval ]0;11[ --> 10 times "0" and 10 times "1".

%e Take "30"; there are 30 even digits and 30 odd digits in the interval ]0;31[, etc.

%K base,easy,nonn

%O 1,1

%A _Eric Angelini_, Aug 11 2005