The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 123448 |
| 2 | 516726 |
| 3 | 2580056 |
| 4 | 15790369 |
| 5 | 42268052 |
| 6 | 112212755 |
| 7 | 285887828 |
| 8 | 618934541 |
| 9 | 1350494500 |
| 10 | 2846403490 |
| 11 | 5457308162 |
| 12 | 10176928711 |
| 13 | 18525837896 |
| 14 | 32797197834 |
| 15 | 57814835454 |
| 16 | 101333055480 |
| 17 | 176155226758 |
| 18 | 306747409603 |
| 19 | 534337638068 |
[123448,516726,2580056,15790369,42268052, 112212755,285887828,618934541,1350494500, 2846403490,5457308162,10176928711,18525837896, 32797197834,57814835454,101333055480,176155226758, 306747409603,534337638068] |