id:A073348 - OEIS Search Results

Search: id:A073348

Displaying 1-1 of 1 results found.

page 1

Least k such that sigma(k)/k >= sigma(n)/n.

+0
1

1, 2, 2, 4, 2, 6, 2, 6, 2, 6, 2, 12, 2, 4, 4, 6, 2, 12, 2, 12, 4, 4, 2, 24, 2, 4, 2, 6, 2, 24, 2, 6, 2, 4, 2, 36, 2, 4, 2, 12, 2, 12, 2, 6, 4, 4, 2, 48, 2, 6, 2, 6, 2, 12, 2, 12, 2, 4, 2, 60, 2, 4, 4, 6, 2, 12, 2, 6, 2, 12, 2, 60, 2, 4, 4, 6, 2, 12, 2, 12, 2, 4, 2, 60, 2, 4, 2, 12, 2, 60, 2, 6, 2, 4 (list; graph; listen)

	OFFSET	`1,2`
	FORMULA	`It seems that sum(k=1, n, a(k)) is asymptotic to CnLog(n)*Log(Log(n)) with C>1.`
	PROGRAM	`(PARI) a(n)=if(n<0, 0, s=1; while(sigma(s)/s<sigma(n)/n, s++); s)`
	CROSSREFS	`Sequence in context: A054704 A082174 A074369 this_sequence A122457 A139770 A140635` `Adjacent sequences: A073345 A073346 A073347 this_sequence A073349 A073350 A073351`
	KEYWORD	`easy,nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Aug 23 2002`

page 1

Search completed in 0.002 seconds

Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

AT&T Labs Research