The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 10 |
| 2 | 192 |
| 3 | 2859 |
| 4 | 30802 |
| 5 | 248182 |
| 6 | 1592348 |
| 7 | 8528422 |
| 8 | 39423196 |
| 9 | 161160206 |
| 10 | 593478797 |
| 11 | 1997447386 |
| 12 | 6215980425 |
| 13 | 18056320047 |
| 14 | 49345966862 |
| 15 | 127715626611 |
| 16 | 314800577783 |
| 17 | 742509146839 |
| 18 | 1682790560239 |
| 19 | 3677643193138 |
| 20 | 7774488966837 |
| 21 | 15941255148133 |
[10,192,2859,30802,248182,1592348,8528422, 39423196,161160206,593478797,1997447386, 6215980425,18056320047,49345966862,127715626611, 314800577783,742509146839,1682790560239, 3677643193138,7774488966837,15941255148133] |