id:A137266 - OEIS Search Results

Search: id:A137266

Displaying 1-1 of 1 results found.

page 1

a(n) = number of positive integers k where k divides (n - floor(n/k)).

+0
2

1, 1, 2, 3, 2, 2, 3, 4, 3, 3, 3, 4, 3, 3, 4, 5, 3, 5, 3, 4, 4, 4, 3, 6, 3, 5, 5, 5, 2, 4, 6, 6, 3, 3, 5, 8, 4, 3, 4, 7, 2, 5, 5, 6, 5, 3, 4, 8, 5, 6, 4, 5, 4, 6, 4, 6, 5, 5, 3, 8, 2, 5, 7, 8, 4, 5, 4, 6, 4, 5, 5, 9, 4, 5, 6, 6, 3, 5, 5, 9, 7, 4, 3, 8, 5, 4, 5, 6, 4, 8, 6, 5, 5, 4, 5, 9, 3, 6, 7, 10, 4, 5, 4, 6, 5 (list; graph; listen)

	OFFSET	`1,3`
	LINKS	`Leroy Quet, Home Page (listed in lieu of email address)`
	EXAMPLE	`For n = 8, checking: 1 divides (8 - floor(8/1))=0. 2 divides (8 - floor(8/2))=4. 3 divides (8 - floor(8/3))=6. 4 doesn't divide (8 - floor(8/4))=6. 5 doesn't divide (8 - floor(8/5))=7. 6 doesn't divide (8 - floor(8/6))=7. 7 divides (8 - floor(8/7))=7. 8 doesn't divide (8 - floor(8/8))=7. For k > 8, k doesn't divide (n - floor(n/k)) = n. There are 4 cases where k does divide (n-floor(n/k)); so a(8) = 4.`
	CROSSREFS	`Sequence in context: A118480 A104377 A109337 this_sequence A062948 A096258 A049879` `Adjacent sequences: A137263 A137264 A137265 this_sequence A137267 A137268 A137269`
	KEYWORD	`nonn`
	AUTHOR	`Leroy Quet Apr 26 2008`
	EXTENSIONS	`More terms from R. J. Mathar (mathar(AT)strw.leidenunvi.nl), Feb 27 2009`

page 1

Search completed in 0.002 seconds

Last modified November 30 13:13 EST 2009. Contains 167758 sequences.

AT&T Labs Research