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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 3 |
| 4 | 6 |
| 5 | 13 |
| 6 | 24 |
| 7 | 44 |
| 8 | 75 |
| 9 | 124 |
| 10 | 200 |
| 11 | 314 |
| 12 | 480 |
| 13 | 719 |
| 14 | 1058 |
| 15 | 1530 |
| 16 | 2180 |
| 17 | 3062 |
| 18 | 4248 |
| 19 | 5823 |
| 20 | 7898 |
| 21 | 10605 |
| 22 | 14108 |
| 23 | 18607 |
| 24 | 24343 |
| 25 | 31607 |
| 26 | 40749 |
| 27 | 52184 |
| 28 | 66408 |
| 29 | 84009 |
| 30 | 105677 |
| 31 | 132226 |
| 32 | 164608 |
| 33 | 203936 |
| 34 | 251505 |
| 35 | 308815 |
| 36 | 377606 |
| 37 | 459883 |
| 38 | 557954 |
| 39 | 674470 |
| 40 | 812467 |
[1,1,3,6,13,24,44,75,124,200,314,480,719,1058, 1530,2180,3062,4248,5823,7898,10605,14108,18607, 24343,31607,40749,52184,66408,84009,105677,132226, 164608,203936,251505,308815,377606,459883,557954, 674470,812467] |