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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 10 |
| 3 | 30 |
| 4 | 72 |
| 5 | 180 |
| 6 | 394 |
| 7 | 760 |
| 8 | 1474 |
| 9 | 2552 |
| 10 | 4312 |
| 11 | 6764 |
| 12 | 10664 |
| 13 | 15290 |
| 14 | 22764 |
| 15 | 31252 |
| 16 | 44134 |
| 17 | 58360 |
| 18 | 80192 |
| 19 | 101988 |
| 20 | 135852 |
| 21 | 169552 |
| 22 | 218968 |
| 23 | 267170 |
| 24 | 340142 |
| 25 | 406342 |
| 26 | 507626 |
| 27 | 600242 |
| 28 | 735996 |
| 29 | 856054 |
| 30 | 1042952 |
| 31 | 1193878 |
| 32 | 1435032 |
| 33 | 1633492 |
| 34 | 1943892 |
| 35 | 2185304 |
[1,2,10,30,72,180,394,760,1474,2552,4312,6764, 10664,15290,22764,31252,44134,58360,80192,101988, 135852,169552,218968,267170,340142,406342,507626, 600242,735996,856054,1042952,1193878,1435032, 1633492,1943892,2185304] |