The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 3 |
| 4 | 11 |
| 5 | 59 |
| 6 | 439 |
| 7 | 4472 |
| 8 | 62935 |
| 9 | 1209430 |
| 10 | 32051191 |
| 11 | 1166861194 |
| 12 | 58721422238 |
| 13 | 4088067759572 |
| 14 | 394939948283555 |
| 15 | 53103347018217191 |
| 16 | 9947926726521152127 |
| 17 | 2605793744856238449900 |
| 18 | 954325686563453398851948 |
| 19 | 490307345827423220333318823 |
| 20 | 353233139353798743949103145806 |
| 21 | 357764578484543977966398255436596 |
| 22 | 509302875450935550273793437784438990 |
| 23 | 1020636223630190179625684042390508142277 |
[1,1,1,3,11,59,439,4472,62935,1209430,32051191, 1166861194,58721422238,4088067759572, 394939948283555,53103347018217191, 9947926726521152127,2605793744856238449900, 954325686563453398851948, 490307345827423220333318823, 353233139353798743949103145806, 357764578484543977966398255436596, 509302875450935550273793437784438990, 1020636223630190179625684042390508142277] |