|
| |
|
|
A194532
|
|
Jordan function ratio J_6(n)/J_2(n).
|
|
0
|
|
|
|
1, 21, 91, 336, 651, 1911, 2451, 5376, 7371, 13671, 14763, 30576, 28731, 51471, 59241, 86016, 83811, 154791, 130683, 218736, 223041, 310023, 280371, 489216, 406875, 603351, 597051, 823536, 708123, 1244061, 924483, 1376256, 1343433, 1760031, 1595601, 2476656, 1875531, 2744343
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
1,2
|
|
|
COMMENTS
|
Multiplicative with a(p^e) = p^(4*(e-1))*(p^2+p+1)*(p^2-p+1), e>0.
Dirichlet convolution of A000583 with the multiplicative function which starts 1, 5, 10, 0, 26, 50, 50, 0, 0, 130, 122, 0, 170, 250, 260, 0, 290,..
|
|
|
LINKS
|
Table of n, a(n) for n=1..38.
|
|
|
FORMULA
|
a(n) = A069091(n)/A007434(n).
Dirichlet generating function zeta(s-4)*product_{primes p} (1+p^(2-s)+p^(-s)).
|
|
|
CROSSREFS
|
Cf. A065959.
Sequence in context: A020248 A225705 A203173 * A065827 A143843 A119109
Adjacent sequences: A194529 A194530 A194531 * A194533 A194534 A194535
|
|
|
KEYWORD
|
nonn,mult,easy
|
|
|
AUTHOR
|
R. J. Mathar, Aug 28 2011
|
|
|
STATUS
|
approved
|
| |
|
|
