|
| |
|
|
A146488
|
|
Decimal expansion of Product_{q in A014613} (1-1/(q^2*(q-1))).
|
|
1
| |
|
|
9, 9, 9, 5, 9, 5, 2, 7, 8, 5, 8, 6, 5, 3, 5, 5, 3, 5, 6, 3, 7, 4, 5, 2, 4, 9, 3, 2, 4, 8, 3, 3, 6, 4, 5, 3, 0, 8, 3, 6, 5, 0, 6, 3, 2, 4, 1, 2, 6, 7, 4, 0, 4, 9, 8, 8, 7
(list; constant; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 0,1
|
|
|
COMMENTS
| 4-almost prime analog of A065414.
|
|
|
FORMULA
| The logarithm is -sum_{s>=2} sum_{j=1..floor[s/(1+r)]} binomial(s-r*j-1,j-1)*P_4(s)/j at r=2, where P_k(s) are the k-almost prime zeta functions of arXiv:0803.0900.
|
|
|
EXAMPLE
| 0.99959527858653553563... = (1-1/3840)*(1-1/13248)*(1-1/45360)*(1-1/62400)*..
|
|
|
CROSSREFS
| Sequence in context: A019897 A111613 A111591 * A051557 A146491 A112118
Adjacent sequences: A146485 A146486 A146487 * A146489 A146490 A146491
|
|
|
KEYWORD
| nonn,cons,less
|
|
|
AUTHOR
| R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Feb 13 2009
|
| |
|
|
