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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 3 |
| 3 | 110 |
| 4 | 657 |
| 5 | 2172 |
| 6 | 5375 |
| 7 | 11178 |
| 8 | 20685 |
| 9 | 35192 |
| 10 | 56187 |
| 11 | 85350 |
| 12 | 124553 |
| 13 | 175860 |
| 14 | 241527 |
| 15 | 324002 |
| 16 | 425925 |
| 17 | 550128 |
| 18 | 699635 |
| 19 | 877662 |
| 20 | 1087617 |
| 21 | 1333100 |
| 22 | 1617903 |
| 23 | 1946010 |
| 24 | 2321597 |
| 25 | 2749032 |
| 26 | 3232875 |
| 27 | 3777878 |
| 28 | 4388985 |
| 29 | 5071332 |
| 30 | 5830247 |
| 31 | 6671250 |
| 32 | 7600053 |
| 33 | 8622560 |
[0,0,3,110,657,2172,5375,11178,20685,35192,56187, 85350,124553,175860,241527,324002,425925,550128, 699635,877662,1087617,1333100,1617903,1946010, 2321597,2749032,3232875,3777878,4388985,5071332, 5830247,6671250,7600053,8622560] |