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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 9 |
| 4 | 34 |
| 5 | 95 |
| 6 | 210 |
| 7 | 406 |
| 8 | 740 |
| 9 | 1161 |
| 10 | 1920 |
| 11 | 2695 |
| 12 | 4116 |
| 13 | 5369 |
| 14 | 7868 |
| 15 | 9690 |
| 16 | 13640 |
| 17 | 16116 |
| 18 | 22419 |
| 19 | 25365 |
| 20 | 34160 |
| 21 | 38640 |
| 22 | 50622 |
| 23 | 55154 |
| 24 | 73320 |
| 25 | 77225 |
| 26 | 100100 |
| 27 | 107730 |
| 28 | 135576 |
| 29 | 141085 |
| 30 | 182340 |
| 31 | 184760 |
| 32 | 233616 |
| 33 | 243408 |
| 34 | 297738 |
| 35 | 301420 |
| 36 | 385110 |
| 37 | 377511 |
| 38 | 467210 |
| 39 | 478842 |
[0,1,9,34,95,210,406,740,1161,1920,2695,4116,5369, 7868,9690,13640,16116,22419,25365,34160,38640, 50622,55154,73320,77225,100100,107730,135576, 141085,182340,184760,233616,243408,297738,301420, 385110,377511,467210,478842] |