OFFSET
0,2
COMMENTS
See A375533 (the numerators) for further information.
LINKS
Alois P. Heinz, Table of n, a(n) for n = 0..313
N. J. A. Sloane, A Nasty Surprise in a Sequence and Other OEIS Stories, Experimental Mathematics Seminar, Rutgers University, Oct 10 2024, Youtube video; Slides [Mentions this sequence]
EXAMPLE
The first few sums are 0/1, 1/2, 5/6, 31/30, 247/210, 5891/4830, 175669/140070, 6639823/5182590, ...
MATHEMATICA
a[n_]:=Denominator[Sum[ 1/Part[ResourceFunction["OEISSequence"]["A038603"], i], {i, n}]]; Array[a, 18] (* Stefano Spezia, Sep 06 2024 *)
CROSSREFS
KEYWORD
nonn,frac
AUTHOR
N. J. A. Sloane, Sep 06 2024
EXTENSIONS
a(0)=1 prepended by Alois P. Heinz, Oct 21 2024
STATUS
approved