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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 6 |
| 3 | 12 |
| 4 | 24 |
| 5 | 48 |
| 6 | 93 |
| 7 | 180 |
| 8 | 351 |
| 9 | 675 |
| 10 | 1191 |
| 11 | 1963 |
| 12 | 3015 |
| 13 | 3772 |
| 14 | 3732 |
| 15 | 2837 |
| 16 | 1589 |
| 17 | 572 |
| 18 | 78 |
| 19 | 18 |
[1,3,6,12,24,48,93,180,351,675,1191,1963,3015, 3772,3732,2837,1589,572,78,18] |