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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 9 |
| 3 | 25 |
| 4 | 56 |
| 5 | 108 |
| 6 | 187 |
| 7 | 299 |
| 8 | 450 |
| 9 | 646 |
| 10 | 893 |
| 11 | 1197 |
| 12 | 1564 |
| 13 | 2000 |
| 14 | 2511 |
| 15 | 3103 |
| 16 | 3782 |
| 17 | 4554 |
| 18 | 5425 |
| 19 | 6401 |
| 20 | 7488 |
| 21 | 8692 |
| 22 | 10019 |
| 23 | 11475 |
| 24 | 13066 |
| 25 | 14798 |
| 26 | 16677 |
| 27 | 18709 |
| 28 | 20900 |
| 29 | 23256 |
| 30 | 25783 |
| 31 | 28487 |
| 32 | 31374 |
| 33 | 34450 |
| 34 | 37721 |
| 35 | 41193 |
| 36 | 44872 |
| 37 | 48764 |
| 38 | 52875 |
| 39 | 57211 |
| 40 | 61778 |
[2,9,25,56,108,187,299,450,646,893,1197,1564,2000, 2511,3103,3782,4554,5425,6401,7488,8692,10019, 11475,13066,14798,16677,18709,20900,23256,25783, 28487,31374,34450,37721,41193,44872,48764,52875, 57211,61778] |