Substitute n=1
Substitute n=2
Substitute n=3
As you see,
represents the "monotonous" sequence:
10, 10, 10, 10, ...
which can be considered as either:
1. arithmetic sequence with first term 10, and common difference 0.
or
2. a geometric sequence with first term 10, and common ratio = 1.
Anyway, like all other terms in this "monotonous", the 200th term is 10,
but so is the 199th, and the 201st, and the 999,999,999,999th. :-)
Edwin