id:A158294 - OEIS Search Results

Search: id:A158294

Displaying 1-1 of 1 results found.

page 1

Averages of squares of divisors of numbers in A020486 [i.e. numbers m with property that average of squares of divisors is an integer: sigma_0(m) divides sigma_2(m)].

+0
1

1, 5, 7, 13, 25, 61, 35, 85, 65, 145, 181, 91, 125, 265, 217, 205, 175, 421, 481, 305, 325, 685, 425, 841, 925, 427, 1105, 341, 817, 725 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`a(n) = A001157(A020486(n))/A000005(A020486(n)).`
	EXAMPLE	`a(12) = A001157(A020486(12))/A000005(A020486(12)) = A001157(20)/A000005(20) = 546/6 = 91.`
	CROSSREFS	`Cf. A001157, A020486, A000005.` `Sequence in context: A155757 A027674 A124307 this_sequence A090610 A161379 A141191` `Adjacent sequences: A158291 A158292 A158293 this_sequence A158295 A158296 A158297`
	KEYWORD	`nonn`
	AUTHOR	`Jaroslav Krizek (jaroslav.krizek(AT)atlas.cz), Mar 15 2009`

page 1

Search completed in 0.002 seconds

Last modified November 25 14:49 EST 2009. Contains 167514 sequences.

AT&T Labs Research