The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 26 |
| 3 | 226 |
| 4 | 2243 |
| 5 | 21195 |
| 6 | 201598 |
| 7 | 1913495 |
| 8 | 18172469 |
| 9 | 172565016 |
| 10 | 1638746380 |
| 11 | 15562024443 |
| 12 | 147782179281 |
| 13 | 1403387239808 |
| 14 | 13327022602525 |
| 15 | 126557734357659 |
| 16 | 1201833388741096 |
| 17 | 11413000424299772 |
| 18 | 108381561410710361 |
[1,26,226,2243,21195,201598,1913495,18172469, 172565016,1638746380,15562024443,147782179281, 1403387239808,13327022602525,126557734357659, 1201833388741096,11413000424299772, 108381561410710361] |