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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 5 |
| 2 | 30 |
| 3 | 105 |
| 4 | 280 |
| 5 | 630 |
| 6 | 1260 |
| 7 | 2310 |
| 8 | 3960 |
| 9 | 6435 |
| 10 | 10010 |
| 11 | 15015 |
| 12 | 21840 |
| 13 | 30940 |
| 14 | 42840 |
| 15 | 58140 |
| 16 | 77520 |
| 17 | 101745 |
| 18 | 131670 |
| 19 | 168245 |
| 20 | 212520 |
| 21 | 265650 |
| 22 | 328900 |
| 23 | 403650 |
| 24 | 491400 |
| 25 | 593775 |
| 26 | 712530 |
| 27 | 849555 |
| 28 | 1006880 |
| 29 | 1186680 |
| 30 | 1391280 |
| 31 | 1623160 |
| 32 | 1884960 |
| 33 | 2179485 |
[0,5,30,105,280,630,1260,2310,3960,6435,10010, 15015,21840,30940,42840,58140,77520,101745,131670, 168245,212520,265650,328900,403650,491400,593775, 712530,849555,1006880,1186680,1391280,1623160, 1884960,2179485] |