The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 5 |
| 3 | 10 |
| 4 | 32 |
| 5 | 141 |
| 6 | 740 |
| 7 | 4263 |
| 8 | 33924 |
| 9 | 451917 |
| 10 | 7831308 |
| 11 | 167764973 |
| 12 | 5472669192 |
| 13 | 258530463654 |
| 14 | 15734556958302 |
| 15 | 1343566924722008 |
| 16 | 166506641101860333 |
| 17 | 27977584863900148454 |
| 18 | 6451992368321000124567 |
| 19 | 2112336251628682183231929 |
[1,5,10,32,141,740,4263,33924,451917,7831308, 167764973,5472669192,258530463654,15734556958302, 1343566924722008,166506641101860333, 27977584863900148454,6451992368321000124567, 2112336251628682183231929] |