A093555 Number of non-prime-powers between consecutive prime-powers.

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, 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, 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

Offset: 1

Author

Reinhard Zumkeller, Jul 09 2004

Keywords

• nonn

Comments

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

Crossrefs

Cf. A046933.