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| n | a(n) |
|---|---|
| 1 | 424 |
| 2 | 21523 |
| 3 | 266448 |
| 4 | 1789193 |
| 5 | 8357144 |
| 6 | 30606683 |
| 7 | 94080768 |
| 8 | 253309665 |
| 9 | 614750056 |
| 10 | 1372133587 |
| 11 | 2858593552 |
| 12 | 5620837833 |
| 13 | 10521617432 |
| 14 | 18877802939 |
| 15 | 32642526080 |
| 16 | 54641070081 |
| 17 | 88871500968 |
| 18 | 140882422099 |
| 19 | 218241706192 |
| 20 | 331111612873 |
[424,21523,266448,1789193,8357144,30606683, 94080768,253309665,614750056,1372133587, 2858593552,5620837833,10521617432,18877802939, 32642526080,54641070081,88871500968,140882422099, 218241706192,331111612873] |