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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 8 |
| 3 | 20 |
| 4 | 43 |
| 5 | 81 |
| 6 | 138 |
| 7 | 218 |
| 8 | 325 |
| 9 | 463 |
| 10 | 636 |
| 11 | 848 |
| 12 | 1103 |
| 13 | 1405 |
| 14 | 1758 |
| 15 | 2166 |
| 16 | 2633 |
| 17 | 3163 |
| 18 | 3760 |
| 19 | 4428 |
| 20 | 5171 |
| 21 | 5993 |
| 22 | 6898 |
| 23 | 7890 |
| 24 | 8973 |
| 25 | 10151 |
| 26 | 11428 |
| 27 | 12808 |
| 28 | 14295 |
| 29 | 15893 |
| 30 | 17606 |
| 31 | 19438 |
| 32 | 21393 |
| 33 | 23475 |
| 34 | 25688 |
| 35 | 28036 |
| 36 | 30523 |
| 37 | 33153 |
| 38 | 35930 |
| 39 | 38858 |
| 40 | 41941 |
| 41 | 45183 |
[1,3,8,20,43,81,138,218,325,463,636,848,1103,1405, 1758,2166,2633,3163,3760,4428,5171,5993,6898,7890, 8973,10151,11428,12808,14295,15893,17606,19438, 21393,23475,25688,28036,30523,33153,35930,38858, 41941,45183] |