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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 1 |
| 6 | 3 |
| 7 | 4 |
| 8 | 7 |
| 9 | 10 |
| 10 | 15 |
| 11 | 20 |
| 12 | 30 |
| 13 | 39 |
| 14 | 54 |
| 15 | 71 |
| 16 | 96 |
| 17 | 123 |
| 18 | 163 |
| 19 | 208 |
| 20 | 270 |
| 21 | 342 |
| 22 | 437 |
| 23 | 548 |
| 24 | 695 |
| 25 | 865 |
| 26 | 1083 |
| 27 | 1341 |
| 28 | 1666 |
| 29 | 2048 |
| 30 | 2527 |
| 31 | 3089 |
| 32 | 3784 |
| 33 | 4604 |
| 34 | 5606 |
| 35 | 6786 |
| 36 | 8222 |
| 37 | 9907 |
| 38 | 11940 |
| 39 | 14331 |
| 40 | 17196 |
| 41 | 20554 |
| 42 | 24563 |
| 43 | 29252 |
| 44 | 34820 |
| 45 | 41327 |
| 46 | 49016 |
| 47 | 57982 |
| 48 | 68545 |
| 49 | 80833 |
[0,0,0,1,1,3,4,7,10,15,20,30,39,54,71,96,123,163, 208,270,342,437,548,695,865,1083,1341,1666,2048, 2527,3089,3784,4604,5606,6786,8222,9907,11940, 14331,17196,20554,24563,29252,34820,41327,49016, 57982,68545,80833] |