A127303 - OEIS

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

%S 1,2,11,12,111,212,1111,1212,11111,21212,111111,221212,1111111,

%T 1221212,11111111,11221212,111111111,211221212,1111111111,2211221212

%N A doubly-fractal simple sequence. Erase the first (leftmost) digit of every integer: what is left is the sequence itself. The erased digits, one by one, form also the sequence itself.

%Y Cf. A127199, A127204, A127274.

%K base,nonn

%O 1,2

%A _Eric Angelini_, Mar 27 2007