The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 21 |
| 3 | 372 |
| 4 | 9503 |
| 5 | 323528 |
| 6 | 13976119 |
| 7 | 740471952 |
| 8 | 46918236113 |
| 9 | 3486842393336 |
| 10 | 299252510858253 |
| 11 | 29285226572514608 |
| 12 | 3233515108614711055 |
| 13 | 399237909648934968160 |
| 14 | 54699907257463871118015 |
| 15 | 8261287679602024304387776 |
| 16 | 1367355850924129919137226337 |
| 17 | 246745297507913180076213875232 |
[1,2,21,372,9503,323528,13976119,740471952, 46918236113,3486842393336,299252510858253, 29285226572514608,3233515108614711055, 399237909648934968160,54699907257463871118015, 8261287679602024304387776, 1367355850924129919137226337, 246745297507913180076213875232] |