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| n | a(n) |
|---|---|
| 2 | 1 |
| 3 | 4 |
| 4 | 16 |
| 5 | 37 |
| 6 | 89 |
| 7 | 175 |
| 8 | 336 |
| 9 | 579 |
| 10 | 975 |
| 11 | 1533 |
| 12 | 2363 |
| 13 | 3477 |
| 14 | 5030 |
| 15 | 7040 |
| 16 | 9716 |
| 17 | 13078 |
| 18 | 17400 |
| 19 | 22707 |
| 20 | 29342 |
| 21 | 37336 |
| 22 | 47112 |
| 23 | 58705 |
| 24 | 72627 |
| 25 | 88918 |
| 26 | 108185 |
| 27 | 130476 |
| 28 | 156502 |
| 29 | 186315 |
| 30 | 220741 |
| 31 | 259839 |
| 32 | 304554 |
| 33 | 354953 |
| 34 | 412111 |
| 35 | 476101 |
| 36 | 548137 |
| 37 | 628299 |
| 38 | 717946 |
| 39 | 817168 |
| 40 | 927478 |
[1,4,16,37,89,175,336,579,975,1533,2363,3477,5030, 7040,9716,13078,17400,22707,29342,37336,47112, 58705,72627,88918,108185,130476,156502,186315, 220741,259839,304554,354953,412111,476101,548137, 628299,717946,817168,927478] |