A066683 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

A066683

Number of badly sieved numbers <= n.

3

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

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,3

LINKS

Table of n, a(n) for n=1..66.

FORMULA

a(n) = Sum_{k=1..n} A099104(k).

CROSSREFS

Cf. A099104, A066680, A000720.

Sequence in context: A085970 A355538 A238884 * A055038 A373114 A276796

Adjacent sequences: A066680 A066681 A066682 * A066684 A066685 A066686

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Dec 31 2001

STATUS

approved