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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 1 |
| 4 | 1 |
| 5 | 3 |
| 6 | 6 |
| 7 | 10 |
| 8 | 15 |
| 9 | 28 |
| 10 | 45 |
| 11 | 66 |
| 12 | 105 |
| 13 | 153 |
| 14 | 231 |
| 15 | 351 |
| 16 | 496 |
| 17 | 703 |
| 18 | 1035 |
| 19 | 1431 |
| 20 | 2016 |
| 21 | 2850 |
| 22 | 3916 |
| 23 | 5356 |
| 24 | 7381 |
| 25 | 10011 |
| 26 | 13530 |
| 27 | 18336 |
| 28 | 24531 |
| 29 | 32640 |
| 30 | 43660 |
| 31 | 57630 |
| 32 | 75855 |
| 33 | 100128 |
| 34 | 130816 |
| 35 | 170820 |
| 36 | 222778 |
| 37 | 288420 |
| 38 | 372816 |
| 39 | 481671 |
| 40 | 618828 |
| 41 | 793170 |
| 42 | 1016025 |
| 43 | 1295245 |
[0,0,0,1,1,3,6,10,15,28,45,66,105,153,231,351,496, 703,1035,1431,2016,2850,3916,5356,7381,10011, 13530,18336,24531,32640,43660,57630,75855,100128, 130816,170820,222778,288420,372816,481671,618828, 793170,1016025,1295245] |