|
Search: id:A158298
|
|
|
| A158298 |
|
Denominators of averages of squares of the divisors of n. |
|
+0
1
|
|
| 1, 2, 1, 1, 1, 4, 1, 4, 3, 4, 1, 1, 1, 4, 1, 5, 1, 6, 1, 1
(list; graph; listen)
|
|
|
OFFSET
|
1,2
|
|
|
COMMENT
|
Average of squares of the divisors of n = A001157(n)/A000005(n). Iff a(n) = 1, n is in A020486. Numerators of averages of squares of divisors of n: 1,5,5,7,13,50,25,85,91,130,61,35,85,250,65,341,145,455,181,91,...
|
|
CROSSREFS
|
Cf. A001157, A000005, A020486.
Sequence in context: A139320 A118106 A143201 this_sequence A112331 A133910 A066441
Adjacent sequences: A158295 A158296 A158297 this_sequence A158299 A158300 A158301
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Jaroslav Krizek (jaroslav.krizek(AT)atlas.cz), Mar 15 2009
|
|
|
Search completed in 0.002 seconds
|
