| n | a(n) |
|---|---|
| 1 | 5 |
| 2 | 15 |
| 3 | 30 |
| 4 | 135 |
| 5 | 385 |
| 6 | 490 |
| 7 | 1255 |
| 8 | 1575 |
| 9 | 3010 |
| 10 | 4565 |
| 11 | 12310 |
| 12 | 26015 |
| 13 | 31185 |
| 14 | 75175 |
| 15 | 173525 |
| 16 | 386155 |
| 17 | 715220 |
| 18 | 831820 |
| 19 | 1121505 |
| 20 | 1741630 |
| 21 | 2323520 |
| 22 | 3087735 |
| 23 | 3554345 |
| 24 | 4697205 |
| 25 | 7089500 |
| 26 | 13848650 |
| 27 | 20506255 |
| 28 | 26543660 |
| 29 | 49995925 |
| 30 | 92669720 |
| 31 | 133230930 |
| 32 | 169229875 |
[5,15,30,135,385,490,1255,1575,3010,4565,12310, 26015,31185,75175,173525,386155,715220,831820, 1121505,1741630,2323520,3087735,3554345,4697205, 7089500,13848650,20506255,26543660,49995925, 92669720,133230930,169229875] |