|
Search: id:A091852
|
|
|
| A091852 |
|
Numerator of sum(i=1,n, prime(i)/prime(i+1)). |
|
+0
2
|
|
| 2, 19, 208, 3023, 52004, 1079263, 24845332, 663589691, 21809669044, 769910292199, 31595368408378, 1432693760237483, 67842962092519574, 3469898586979325623, 198354535000733806154, 12566530264688830748431
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
COMMENT
|
Proposed by Mohammed BOUAYOUN, Feb 16 2004; computed by R. K. Guy, Feb 17 2004
|
|
EXAMPLE
|
The sums are f(1)=2/3, f(2)=2/3 + 3/5, f(3)=2/3+3/5+5/7, f(4)=2/3+3/5+5/7+7/11, ...
|
|
MATHEMATICA
|
A091852[n_] := Numerator[ Sum[ Prime[i] / Prime[i + 1], {i, n}]]; Table[ A091852[n], {n, 16}] (from Robert G. Wilson v Mar 16 2004)
|
|
CROSSREFS
|
Denominators are in A070826.
Sequence in context: A145104 A114016 A126039 this_sequence A024227 A106945 A125632
Adjacent sequences: A091849 A091850 A091851 this_sequence A091853 A091854 A091855
|
|
KEYWORD
|
nonn,frac
|
|
AUTHOR
|
N. J. A. Sloane (njas(AT)research.att.com), Mar 13 2004
|
|
EXTENSIONS
|
More terms from Robert G. Wilson v (rgwv(AT)rgwv.com), Mar 16 2004
|
|
|
Search completed in 0.002 seconds
|
