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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 2 |
| 3 | 10 |
| 4 | 31 |
| 5 | 75 |
| 6 | 155 |
| 7 | 287 |
| 8 | 490 |
| 9 | 786 |
| 10 | 1200 |
| 11 | 1760 |
| 12 | 2497 |
| 13 | 3445 |
| 14 | 4641 |
| 15 | 6125 |
| 16 | 7940 |
| 17 | 10132 |
| 18 | 12750 |
| 19 | 15846 |
| 20 | 19475 |
| 21 | 23695 |
| 22 | 28567 |
| 23 | 34155 |
| 24 | 40526 |
| 25 | 47750 |
| 26 | 55900 |
| 27 | 65052 |
| 28 | 75285 |
| 29 | 86681 |
| 30 | 99325 |
| 31 | 113305 |
| 32 | 128712 |
| 33 | 145640 |
| 34 | 164186 |
| 35 | 184450 |
| 36 | 206535 |
| 37 | 230547 |
[0,0,2,10,31,75,155,287,490,786,1200,1760,2497, 3445,4641,6125,7940,10132,12750,15846,19475,23695, 28567,34155,40526,47750,55900,65052,75285,86681, 99325,113305,128712,145640,164186,184450,206535, 230547] |