A093555 - OEIS

%I #5 Mar 30 2012 18:50:43

%S 0,0,0,0,1,0,0,1,1,2,0,1,3,1,1,1,1,0,4,3,1,3,1,3,5,1,2,2,3,1,5,1,1,5,

%T 7,3,1,3,1,3,7,3,1,0,2,5,1,9,1,5,5,3,1,3,5,1,9,1,3,1,11,11,3,1,3,5,1,

%U 1,7,4,0,5,5,1,5,3,1,5,3,13,3,1,3,13,5,5,3,1,3,5,1,5,5,5,3,5,7,3,7,9

%N Number of non-prime-powers between consecutive prime-powers.

%C a(n) = A000961(n+1)-A000961(n)-1 = A057820(n)-1.

%Y Cf. A046933.

%K nonn

%O 1,10

%A _Reinhard Zumkeller_, Jul 09 2004