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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 3 |
| 3 | 20 |
| 4 | 64 |
| 5 | 236 |
| 6 | 432 |
| 7 | 1372 |
| 8 | 2652 |
| 9 | 5588 |
| 10 | 8384 |
| 11 | 18576 |
| 12 | 28143 |
| 13 | 52588 |
| 14 | 71476 |
| 15 | 106700 |
| 16 | 152688 |
| 17 | 251698 |
| 18 | 323451 |
| 19 | 496672 |
| 20 | 639599 |
| 21 | 847700 |
| 22 | 1059379 |
| 23 | 1526548 |
| 24 | 1855287 |
| 25 | 2479604 |
| 26 | 2990859 |
| 27 | 3827060 |
| 28 | 4631431 |
| 29 | 6138690 |
| 30 | 7153524 |
| 31 | 9258556 |
| 32 | 10957212 |
| 33 | 13153070 |
| 34 | 15219123 |
| 35 | 18354306 |
[0,3,20,64,236,432,1372,2652,5588,8384,18576, 28143,52588,71476,106700,152688,251698,323451, 496672,639599,847700,1059379,1526548,1855287, 2479604,2990859,3827060,4631431,6138690,7153524, 9258556,10957212,13153070,15219123,18354306] |