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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 4 |
| 3 | 6 |
| 4 | 16 |
| 5 | 22 |
| 6 | 39 |
| 7 | 103 |
| 8 | 163 |
| 9 | 240 |
| 10 | 1048 |
| 11 | 1974 |
| 12 | 2559 |
| 13 | 5880 |
| 14 | 14436 |
| 15 | 28338 |
| 16 | 32796 |
| 17 | 38079 |
| 18 | 56779 |
| 19 | 91215 |
| 20 | 111325 |
| 21 | 115863 |
| 22 | 138604 |
[1,4,6,16,22,39,103,163,240,1048,1974,2559,5880, 14436,28338,32796,38079,56779,91215,111325,115863, 138604] |