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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 1 |
| 6 | 3 |
| 7 | 5 |
| 8 | 10 |
| 9 | 15 |
| 10 | 23 |
| 11 | 33 |
| 12 | 52 |
| 13 | 68 |
| 14 | 94 |
| 15 | 132 |
| 16 | 180 |
| 17 | 239 |
| 18 | 318 |
| 19 | 412 |
| 20 | 543 |
| 21 | 693 |
| 22 | 885 |
| 23 | 1131 |
| 24 | 1443 |
| 25 | 1803 |
| 26 | 2250 |
| 27 | 2808 |
| 28 | 3499 |
| 29 | 4321 |
| 30 | 5336 |
| 31 | 6552 |
| 32 | 8032 |
| 33 | 9799 |
| 34 | 11914 |
| 35 | 14456 |
| 36 | 17528 |
| 37 | 21136 |
| 38 | 25458 |
| 39 | 30588 |
| 40 | 36699 |
| 41 | 43869 |
| 42 | 52422 |
| 43 | 62437 |
| 44 | 74290 |
| 45 | 88186 |
| 46 | 104527 |
| 47 | 123670 |
[0,0,0,1,1,3,5,10,15,23,33,52,68,94,132,180,239, 318,412,543,693,885,1131,1443,1803,2250,2808,3499, 4321,5336,6552,8032,9799,11914,14456,17528,21136, 25458,30588,36699,43869,52422,62437,74290,88186, 104527,123670] |