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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 6 |
| 3 | 15 |
| 4 | 36 |
| 5 | 72 |
| 6 | 139 |
| 7 | 244 |
| 8 | 414 |
| 9 | 663 |
| 10 | 1030 |
| 11 | 1540 |
| 12 | 2247 |
| 13 | 3187 |
| 14 | 4433 |
| 15 | 6036 |
| 16 | 8088 |
| 17 | 10658 |
| 18 | 13861 |
| 19 | 17785 |
| 20 | 22571 |
| 21 | 28329 |
| 22 | 35227 |
| 23 | 43401 |
| 24 | 53049 |
| 25 | 64333 |
| 26 | 77485 |
| 27 | 92697 |
| 28 | 110235 |
| 29 | 130324 |
| 30 | 153268 |
| 31 | 179326 |
| 32 | 208843 |
| 33 | 242115 |
| 34 | 279529 |
| 35 | 321422 |
| 36 | 368226 |
| 37 | 420319 |
| 38 | 478182 |
| 39 | 542238 |
| 40 | 613017 |
[0,1,6,15,36,72,139,244,414,663,1030,1540,2247, 3187,4433,6036,8088,10658,13861,17785,22571,28329, 35227,43401,53049,64333,77485,92697,110235,130324, 153268,179326,208843,242115,279529,321422,368226, 420319,478182,542238,613017] |