OFFSET
0,2
LINKS
Alois P. Heinz, Table of n, a(n) for n = 0..11
FORMULA
a(n+1) = b(n+1)*a(n)^2 + a(n), with a(1) = 4, where b(n) is defined in A376048.
EXAMPLE
The first few values of S(n) are 0/1, 3/4, 19/20, 1619/1620, 2626019/2626020, 34479907828019/34479907828020, ...
CROSSREFS
KEYWORD
nonn,base,frac
AUTHOR
N. J. A. Sloane, Sep 13 2024.
EXTENSIONS
a(0)=1 prepended by Alois P. Heinz, Oct 18 2024
STATUS
approved