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| n | a(n) |
|---|---|
| 1 | 2384 |
| 2 | 10870 |
| 3 | 54212 |
| 4 | 183210 |
| 5 | 536906 |
| 6 | 1612832 |
| 7 | 4205934 |
| 8 | 10525070 |
| 9 | 25843648 |
| 10 | 60108505 |
| 11 | 134388526 |
| 12 | 293848960 |
| 13 | 621358505 |
| 14 | 1276346055 |
| 15 | 2565832463 |
| 16 | 5035276195 |
| 17 | 9660711323 |
| 18 | 18188928868 |
| 19 | 33596838971 |
| 20 | 60932752216 |
| 21 | 108732023416 |
[2384,10870,54212,183210,536906,1612832,4205934, 10525070,25843648,60108505,134388526,293848960, 621358505,1276346055,2565832463,5035276195, 9660711323,18188928868,33596838971,60932752216, 108732023416] |