The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 23 |
| 3 | 235 |
| 4 | 2356 |
| 5 | 23567 |
| 6 | 235678 |
| 7 | 23567810 |
| 8 | 2356781011 |
| 9 | 235678101112 |
| 10 | 23567810111213 |
| 11 | 2356781011121314 |
| 12 | 235678101112131415 |
| 13 | 23567810111213141517 |
| 14 | 2356781011121314151718 |
| 15 | 235678101112131415171819 |
| 16 | 23567810111213141517181920 |
[2,23,235,2356,23567,235678,23567810,2356781011, 235678101112,23567810111213,2356781011121314, 235678101112131415,23567810111213141517, 2356781011121314151718,235678101112131415171819, 23567810111213141517181920] |