A129946 - OEIS

A129946

A self-describing sequence. Underline all a(n)th digits of the sequence (first, second, third, fourth, fifth, sixth, seventh, eighth, ninth, eleventh digit, etc.) The non-underlined digits form the sequence itself.

%I #2 Mar 31 2012 13:46:53

%S 1,2,3,4,5,6,7,8,9,11,12,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,

%T 29,30,31,32,34,36,38,40,42,44,46,47,48,49,50,51,52,53,54,55,56,57,58,

%U 59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81

%N A self-describing sequence. Underline all a(n)th digits of the sequence (first, second, third, fourth, fifth, sixth, seventh, eighth, ninth, eleventh digit, etc.) The non-underlined digits form the sequence itself.

%K base,easy,nonn

%O 1,2

%A _Eric Angelini_, Jun 09 2007