The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 29 |
| 2 | 320 |
| 3 | 2100 |
| 4 | 9898 |
| 5 | 37044 |
| 6 | 116928 |
| 7 | 323730 |
| 8 | 807675 |
| 9 | 1851421 |
| 10 | 3955952 |
| 11 | 7966322 |
| 12 | 15249780 |
| 13 | 27941200 |
| 14 | 49273344 |
| 15 | 84012300 |
| 16 | 139021461 |
| 17 | 223980645 |
| 18 | 352290400 |
| 19 | 542195192 |
| 20 | 818163038 |
| 21 | 1212563220 |
| 22 | 1767688000 |
| 23 | 2538168750 |
| 24 | 3593841615 |
[1,29,320,2100,9898,37044,116928,323730,807675, 1851421,3955952,7966322,15249780,27941200, 49273344,84012300,139021461,223980645,352290400, 542195192,818163038,1212563220,1767688000, 2538168750,3593841615] |