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| n | a(n) |
|---|---|
| 1 | 6 |
| 2 | 21 |
| 3 | 56 |
| 4 | 133 |
| 5 | 276 |
| 6 | 497 |
| 7 | 820 |
| 8 | 1257 |
| 9 | 1924 |
| 10 | 2823 |
| 11 | 3970 |
| 12 | 5487 |
| 13 | 7250 |
| 14 | 9271 |
| 15 | 11762 |
| 16 | 14889 |
| 17 | 18488 |
| 18 | 22575 |
| 19 | 27332 |
| 20 | 32515 |
| 21 | 38282 |
| 22 | 44839 |
| 23 | 52226 |
| 24 | 60859 |
| 25 | 70656 |
| 26 | 81059 |
| 27 | 92080 |
| 28 | 103743 |
| 29 | 116060 |
| 30 | 130411 |
| 31 | 147048 |
| 32 | 164995 |
| 33 | 184038 |
| 34 | 204749 |
| 35 | 227248 |
| 36 | 250955 |
[6,21,56,133,276,497,820,1257,1924,2823,3970,5487, 7250,9271,11762,14889,18488,22575,27332,32515, 38282,44839,52226,60859,70656,81059,92080,103743, 116060,130411,147048,164995,184038,204749,227248, 250955] |