A096533 Number of composite numbers not greater than the n-th composite number that divide at least one other number not greater than the n-th composite number.

0, 0, 1, 1, 1, 2, 2, 2, 3, 4, 5, 5, 5, 6, 6, 6, 6, 7, 8, 9, 9, 9, 9, 10, 10, 10, 11, 12, 13, 13, 13, 14, 14, 15, 15, 16, 17, 17, 18, 18, 18, 19, 19, 19, 20, 20, 21, 22, 22, 23, 24, 24, 24, 25, 25, 26, 27, 27, 27, 28, 28, 28, 28, 29, 30, 30, 31, 31, 31, 31, 32, 33, 33, 34, 35, 36

Offset

1,6

Comments

a(n) = A065855(floor(A002808(n)/2));

A096532(n) + a(n) = n.

Links

Table of n, a(n) for n=1..76.

Crossrefs

Sequence in context: A162352 A285509 A194813 * A230413 A029096 A194820

Adjacent sequences: A096530 A096531 A096532 * A096534 A096535 A096536

Keyword

nonn

Author

Reinhard Zumkeller, Jun 23 2004

Status

approved