A066682 Indices of badly sieved numbers: a(n) = k if n = A066680(k), otherwise 0.

0, 1, 2, 0, 3, 0, 4, 5, 0, 0, 6, 7, 8, 0, 0, 0, 9, 10, 11, 0, 0, 0, 12, 0, 0, 0, 13, 0, 14, 15, 16, 0, 0, 0, 0, 0, 17, 0, 0, 0, 18, 0, 19, 0, 20, 0, 21, 0, 0, 22, 0, 0, 23, 0, 0, 0, 0, 0, 24, 0, 25, 0, 26, 0, 0, 0, 27, 0, 0, 28, 29, 0, 30, 0, 31, 0, 0, 0, 32

Offset: 1

Author

Reinhard Zumkeller, Dec 31 2001

Keywords

• nonn

Crossrefs

Cf. A049084, A066680, A066683, A099104.

Formula

a(n) = A099104(n)*A066683(n).