A115964 revision #5
|
| |
|
|
A115964
|
|
Denominator of Sum[i=1..n] 1/p(i)^3, p(i) = i-th prime.
|
|
11
|
|
|
|
8, 216, 27000, 9261000, 12326391000, 27081081027000, 133049351085651000, 912585499096480209000, 11103427767506874702903000, 270801499821725167129101267000, 8067447481189014453943055845197000
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
1,1
|
|
|
COMMENTS
|
Numerators = A115963. See also: A024451 Numerator of Sum 1/prime(i), i=1..n. A002110 Primorial [denominator of Numerator of Sum 1/prime(i), i=1..n]. A061015 Numerator of Sum_{i=1..n} 1/p(i)^2, p(i) = i-th prime.
|
|
|
LINKS
|
|
|
|
FORMULA
|
a(n) = Denominator of Sum[i=1..n] 1/A000040(i)^3.
|
|
|
EXAMPLE
|
1/8, 35/216, 4591/27000, 1601713/9261000, 2141141003/12326391000, 4716413174591/27081081027000.
|
|
|
MATHEMATICA
|
|
|
|
CROSSREFS
|
|
|
|
KEYWORD
|
easy,frac,nonn
|
|
|
AUTHOR
|
|
|
|
STATUS
|
approved
|
| |
|
|
