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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 3 |
| 5 | 19 |
| 6 | 49 |
| 7 | 92 |
| 8 | 160 |
| 9 | 595 |
| 10 | 3175 |
| 11 | 4043 |
| 12 | 7423 |
| 13 | 8488 |
| 14 | 19341 |
| 15 | 21637 |
[0,1,2,3,19,49,92,160,595,3175,4043,7423,8488, 19341,21637] |