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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 5 |
| 6 | 15 |
| 7 | 35 |
| 8 | 71 |
| 9 | 126 |
| 10 | 215 |
| 11 | 330 |
| 12 | 511 |
| 13 | 715 |
| 14 | 1036 |
| 15 | 1370 |
| 16 | 1891 |
| 17 | 2380 |
| 18 | 3201 |
| 19 | 3876 |
| 20 | 5061 |
| 21 | 6020 |
| 22 | 7645 |
| 23 | 8855 |
| 24 | 11207 |
| 25 | 12655 |
| 26 | 15665 |
| 27 | 17676 |
| 28 | 21512 |
| 29 | 23751 |
| 30 | 29000 |
| 31 | 31465 |
| 32 | 37851 |
| 33 | 41250 |
| 34 | 48756 |
| 35 | 52400 |
| 36 | 62602 |
| 37 | 66045 |
| 38 | 77691 |
| 39 | 82966 |
| 40 | 96521 |
| 41 | 101270 |
| 42 | 118966 |
| 43 | 123410 |
| 44 | 143397 |
[0,0,0,1,5,15,35,71,126,215,330,511,715,1036,1370, 1891,2380,3201,3876,5061,6020,7645,8855,11207, 12655,15665,17676,21512,23751,29000,31465,37851, 41250,48756,52400,62602,66045,77691,82966,96521, 101270,118966,123410,143397] |