The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 10 |
| 3 | 50 |
| 4 | 346 |
| 5 | 3182 |
| 6 | 38770 |
| 7 | 609290 |
| 8 | 11226106 |
| 9 | 250148582 |
| 10 | 7057182250 |
| 11 | 216512001950 |
| 12 | 7903965900226 |
| 13 | 321552174623162 |
| 14 | 13779150603234010 |
| 15 | 644574260638821590 |
| 16 | 33968684108427733426 |
| 17 | 1994885097404292104942 |
| 18 | 121496572792097514728530 |
| 19 | 8114030083731371137603190 |
[1,2,10,50,346,3182,38770,609290,11226106, 250148582,7057182250,216512001950,7903965900226, 321552174623162,13779150603234010, 644574260638821590,33968684108427733426, 1994885097404292104942,121496572792097514728530, 8114030083731371137603190] |