n | a(n) |
---|---|
1 | 1 |
2 | 1221 |
3 | 1233321 |
4 | 1234444321 |
5 | 1234555554321 |
6 | 1234566666654321 |
7 | 1234567777777654321 |
8 | 1234567888888887654321 |
9 | 1234567899999999987654321 |
10 | 1234567901111111110987654321 |
11 | 1234567901222222222220987654321 |
12 | 1234567901233333333333320987654321 |
[1,1221,1233321,1234444321,1234555554321, 1234566666654321,1234567777777654321, 1234567888888887654321,1234567899999999987654321, 1234567901111111110987654321, 1234567901222222222220987654321, 1234567901233333333333320987654321] |