OFFSET
1,2
COMMENTS
In other words, for any n > 0, we have an integer k such that floor(10^k * a(n+1)/a(n)) = 9.
The scatterplot of n -> a(n)/n shows 22 quivering lines.
LINKS
Rémy Sigrist, Table of n, a(n) for n = 1..10000
EXAMPLE
The first terms, alongside a(n+1)/a(n), are:
n a(n) a(n+1)/a(n)
-- ---- -----------
1 1 9
2 9 9
3 81 0.098765...
4 8 9
5 72 0.097222...
6 7 9
7 63 0.095238...
8 6 9
9 54 0.092592...
10 5 9
11 45 0.911111...
12 41 0.097560...
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Rémy Sigrist, Oct 27 2019
STATUS
approved