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| n | a(n) |
|---|---|
| 5 | 3 |
| 6 | 21 |
| 7 | 84 |
| 8 | 252 |
| 9 | 630 |
| 10 | 1386 |
| 11 | 2772 |
| 12 | 5148 |
| 13 | 9009 |
| 14 | 15015 |
| 15 | 24024 |
| 16 | 37128 |
| 17 | 55692 |
| 18 | 81396 |
| 19 | 116280 |
| 20 | 162792 |
| 21 | 223839 |
| 22 | 302841 |
| 23 | 403788 |
| 24 | 531300 |
| 25 | 690690 |
| 26 | 888030 |
| 27 | 1130220 |
| 28 | 1425060 |
| 29 | 1781325 |
| 30 | 2208843 |
| 31 | 2718576 |
| 32 | 3322704 |
| 33 | 4034712 |
| 34 | 4869480 |
| 35 | 5843376 |
| 36 | 6974352 |
| 37 | 8282043 |
| 38 | 9787869 |
| 39 | 11515140 |
[3,21,84,252,630,1386,2772,5148,9009,15015,24024, 37128,55692,81396,116280,162792,223839,302841, 403788,531300,690690,888030,1130220,1425060, 1781325,2208843,2718576,3322704,4034712,4869480, 5843376,6974352,8282043,9787869,11515140] |