id:A070010 - OEIS Search Results

Search: id:A070010

Displaying 1-1 of 1 results found.

page 1

GCD of consecutive values of sum-of-proper divisors.

+0
1

1, 1, 1, 1, 1, 1, 1, 1, 4, 1, 1, 1, 1, 1, 3, 1, 1, 1, 1, 11, 1, 1, 1, 6, 2, 1, 1, 1, 1, 1, 1, 1, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 4, 1, 1, 1, 23, 1, 1, 1, 1, 3, 1, 1, 5, 25, 1, 1, 1, 1, 3, 1, 1, 1, 1 (list; graph; listen)

	OFFSET	`1,9`
	FORMULA	`a(n)=GCD[DivisorSigma[1, n+1]-(n+1), DivisorSigma[1, n]-n]= GCD[A001065(n+1), A001065(n)].`
	CROSSREFS	`Cf. A000203, A001065; GCD of various consecutive function values: A048586, A057467, A058515, A060778, A060780, A069896.` `Sequence in context: A122777 A103524 A110916 this_sequence A046564 A046592 A010326` `Adjacent sequences: A070007 A070008 A070009 this_sequence A070011 A070012 A070013`
	KEYWORD	`nonn`
	AUTHOR	`Labos E. (labos(AT)ana.sote.hu), Apr 11 2002`

page 1

Search completed in 0.002 seconds

Last modified September 8 13:07 EDT 2008. Contains 143486 sequences.

AT&T Labs Research