id:A085972 - OEIS Search Results

Search: id:A085972

Displaying 1-1 of 1 results found.

page 1

Number of numbers <= n that are primes or not prime powers.

+0
3

0, 1, 2, 2, 3, 4, 5, 5, 5, 6, 7, 8, 9, 10, 11, 11, 12, 13, 14, 15, 16, 17, 18, 19, 19, 20, 20, 21, 22, 23, 24, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 54, 55, 56, 57, 58, 59, 60, 61 (list; graph; listen)

	OFFSET	`1,3`
	COMMENT	`a(n) = Max{k: A085971(k)<=n};` `a(n) = n-A085501(n) = A000720(n)+n-A065515(n) = A085970(n)+A000720(n).`
	CROSSREFS	`Sequence in context: A081094 A054633 A072490 this_sequence A136378 A099249 A050296` `Adjacent sequences: A085969 A085970 A085971 this_sequence A085973 A085974 A085975`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jul 06 2003`

page 1

Search completed in 0.002 seconds

Last modified December 3 22:15 EST 2009. Contains 170310 sequences.

AT&T Labs Research