| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 6 |
| 3 | 15 |
| 4 | 35 |
| 5 | 60 |
| 6 | 99 |
| 7 | 154 |
| 8 | 210 |
| 9 | 300 |
| 10 | 405 |
| 11 | 513 |
| 12 | 667 |
| 13 | 836 |
| 14 | 1035 |
| 15 | 1265 |
| 16 | 1512 |
| 17 | 1794 |
| 18 | 2139 |
| 19 | 2491 |
| 20 | 2890 |
| 21 | 3344 |
| 22 | 3822 |
| 23 | 4352 |
| 24 | 4928 |
| 25 | 5547 |
| 26 | 6230 |
| 27 | 6956 |
| 28 | 7749 |
| 29 | 8586 |
| 30 | 9486 |
| 31 | 10450 |
| 32 | 11475 |
[1,6,15,35,60,99,154,210,300,405,513,667,836,1035, 1265,1512,1794,2139,2491,2890,3344,3822,4352,4928, 5547,6230,6956,7749,8586,9486,10450,11475] |