The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 46 |
| 2 | 901 |
| 3 | 13501 |
| 4 | 180001 |
| 5 | 2250001 |
| 6 | 27000001 |
| 7 | 315000001 |
| 8 | 3600000001 |
| 9 | 40500000001 |
| 10 | 450000000001 |
| 11 | 4950000000001 |
| 12 | 54000000000001 |
| 13 | 585000000000001 |
| 14 | 6300000000000001 |
| 15 | 67500000000000001 |
| 16 | 720000000000000001 |
| 17 | 7650000000000000001 |
| 18 | 81000000000000000001 |
[46,901,13501,180001,2250001,27000001,315000001, 3600000001,40500000001,450000000001,4950000000001, 54000000000001,585000000000001,6300000000000001, 67500000000000001,720000000000000001, 7650000000000000001,81000000000000000001] |