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| n | a(n) |
|---|---|
| 0 | 5 |
| 1 | 30 |
| 2 | 135 |
| 3 | 490 |
| 4 | 1575 |
| 5 | 4565 |
| 6 | 12310 |
| 7 | 31185 |
| 8 | 75175 |
| 9 | 173525 |
| 10 | 386155 |
| 11 | 831820 |
| 12 | 1741630 |
| 13 | 3554345 |
| 14 | 7089500 |
| 15 | 13848650 |
| 16 | 26543660 |
| 17 | 49995925 |
| 18 | 92669720 |
| 19 | 169229875 |
| 20 | 304801365 |
| 21 | 541946240 |
| 22 | 952050665 |
| 23 | 1653668665 |
| 24 | 2841940500 |
| 25 | 4835271870 |
| 26 | 8149040695 |
| 27 | 13610949895 |
| 28 | 22540654445 |
| 29 | 37027355200 |
| 30 | 60356673280 |
| 31 | 97662728555 |
| 32 | 156919475295 |
[5,30,135,490,1575,4565,12310,31185,75175,173525, 386155,831820,1741630,3554345,7089500,13848650, 26543660,49995925,92669720,169229875,304801365, 541946240,952050665,1653668665,2841940500, 4835271870,8149040695,13610949895,22540654445, 37027355200,60356673280,97662728555,156919475295] |