id:A072731 - OEIS Search Results

Search: id:A072731

Displaying 1-1 of 1 results found.

page 1

Difference of numbers of composite and prime numbers <= n.

+0
2

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

	OFFSET	`1,3`
	COMMENT	`a(n+1) = a(n) + A066247(n) - A010051(n), a(1) = 0;` `a(n) < 0 iff 1<n<=8.`
	FORMULA	`a(n) = A065855(n) - A000720(n).`
	CROSSREFS	`Cf. A002808, A000040.` `Sequence in context: A029445 A107393 A047885 this_sequence A129174 A129175 A063053` `Adjacent sequences: A072728 A072729 A072730 this_sequence A072732 A072733 A072734`
	KEYWORD	`sign`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)lhsystems.com), Aug 08 2002`

page 1

Search completed in 0.002 seconds

Last modified August 29 17:54 EDT 2008. Contains 143238 sequences.

AT&T Labs Research