OFFSET
1,1
COMMENTS
Here 0.k means the decimal fraction obtained by writing k after the decimal point, e.g. 0.12 = 12/100 = 3/25.
LINKS
Alois P. Heinz, Table of n, a(n) for n = 1..20000
EXAMPLE
The first few values of Sum{k=1..n} 0.k are:
1/10, 3/10, 3/5, 1, 3/2, 21/10, 14/5, 18/5, 9/2, 23/5, 471/100, 483/100, 124/25, 51/10, 21/4, 541/100, 279/50, 144/25, 119/20, 123/20, 159/25, 329/50, 681/100, 141/20, 73/10, 189/25, ...
MAPLE
b:= proc(n) option remember;
n/10^length(n)+`if`(n<2, 0, b(n-1))
end:
a:= n-> denom(b(n)):
seq(a(n), n=1..100); # Alois P. Heinz, Aug 16 2016
CROSSREFS
KEYWORD
nonn,base,frac
AUTHOR
N. J. A. Sloane, Aug 07 2016
STATUS
approved