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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 0 |
| 4 | 3 |
| 5 | 2 |
| 6 | 6 |
| 7 | 6 |
| 8 | 15 |
| 9 | 15 |
| 10 | 29 |
| 11 | 34 |
| 12 | 58 |
| 13 | 70 |
| 14 | 109 |
| 15 | 132 |
| 16 | 199 |
| 17 | 246 |
| 18 | 348 |
| 19 | 435 |
| 20 | 601 |
| 21 | 746 |
| 22 | 1005 |
| 23 | 1252 |
| 24 | 1653 |
| 25 | 2053 |
| 26 | 2666 |
| 27 | 3298 |
| 28 | 4231 |
| 29 | 5219 |
| 30 | 6608 |
| 31 | 8124 |
| 32 | 10198 |
| 33 | 12476 |
| 34 | 15525 |
| 35 | 18927 |
| 36 | 23374 |
| 37 | 28387 |
| 38 | 34823 |
| 39 | 42122 |
| 40 | 51376 |
| 41 | 61922 |
| 42 | 75098 |
| 43 | 90200 |
| 44 | 108874 |
| 45 | 130298 |
| 46 | 156564 |
| 47 | 186777 |
| 48 | 223490 |
| 49 | 265779 |
| 50 | 316799 |
[0,0,1,0,3,2,6,6,15,15,29,34,58,70,109,132,199, 246,348,435,601,746,1005,1252,1653,2053,2666,3298, 4231,5219,6608,8124,10198,12476,15525,18927,23374, 28387,34823,42122,51376,61922,75098,90200,108874, 130298,156564,186777,223490,265779,316799] |