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n-th run has length n-th nonprime number A018252, with digits 0 and 1 only, starting with 0.
1

%I #5 Mar 30 2012 17:33:54

%S 0,1,1,1,1,0,0,0,0,0,0,1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,1,1,1,1,1,1,

%T 1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,

%U 0,0,0,0,0,0,0,0,0,0,0

%N n-th run has length n-th nonprime number A018252, with digits 0 and 1 only, starting with 0.

%C Also the n-th run has length A141468, with digits 0 and 1 only, starting with 1.

%e .n ..... Run ................... Length

%e .1 ..... 0 ..................... 1

%e .2 ..... 1,1,1,1 ............... 4

%e .3 ..... 0,0,0,0,0,0 ........... 6

%e .4 ..... 1,1,1,1,1,1,1,1 ....... 8

%e .5 ..... 0,0,0,0,0,0,0,0,0 ..... 9

%Y Cf. A057211, A138149, A138150, A138709, A138710, A138711, A138712, A138885.

%K easy,nonn

%O 1,1

%A _Omar E. Pol_, Apr 06 2008