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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 7 |
| 3 | 21 |
| 4 | 46 |
| 5 | 87 |
| 6 | 151 |
| 7 | 247 |
| 8 | 386 |
| 9 | 581 |
| 10 | 847 |
| 11 | 1201 |
| 12 | 1662 |
| 13 | 2251 |
| 14 | 2991 |
| 15 | 3907 |
| 16 | 5026 |
| 17 | 6377 |
| 18 | 7991 |
| 19 | 9901 |
| 20 | 12142 |
| 21 | 14751 |
| 22 | 17767 |
| 23 | 21231 |
| 24 | 25186 |
| 25 | 29677 |
| 26 | 34751 |
| 27 | 40457 |
| 28 | 46846 |
| 29 | 53971 |
| 30 | 61887 |
| 31 | 70651 |
| 32 | 80322 |
| 33 | 90961 |
| 34 | 102631 |
| 35 | 115397 |
| 36 | 129326 |
| 37 | 144487 |
| 38 | 160951 |
| 39 | 178791 |
[3,7,21,46,87,151,247,386,581,847,1201,1662,2251, 2991,3907,5026,6377,7991,9901,12142,14751,17767, 21231,25186,29677,34751,40457,46846,53971,61887, 70651,80322,90961,102631,115397,129326,144487, 160951,178791] |