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| n | a(n) |
|---|---|
| 1 | 21 |
| 2 | 151 |
| 3 | 561 |
| 4 | 1503 |
| 5 | 3310 |
| 6 | 6396 |
| 7 | 11256 |
| 8 | 18466 |
| 9 | 28683 |
| 10 | 42645 |
| 11 | 61171 |
| 12 | 85161 |
| 13 | 115596 |
| 14 | 153538 |
| 15 | 200130 |
| 16 | 256596 |
| 17 | 324241 |
| 18 | 404451 |
| 19 | 498693 |
| 20 | 608515 |
| 21 | 735546 |
| 22 | 881496 |
| 23 | 1048156 |
| 24 | 1237398 |
| 25 | 1451175 |
| 26 | 1691521 |
| 27 | 1960551 |
| 28 | 2260461 |
| 29 | 2593528 |
| 30 | 2962110 |
| 31 | 3368646 |
| 32 | 3815656 |
| 33 | 4305741 |
| 34 | 4841583 |
| 35 | 5425945 |
[21,151,561,1503,3310,6396,11256,18466,28683, 42645,61171,85161,115596,153538,200130,256596, 324241,404451,498693,608515,735546,881496,1048156, 1237398,1451175,1691521,1960551,2260461,2593528, 2962110,3368646,3815656,4305741,4841583,5425945] |