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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 12 |
| 5 | 228 |
| 6 | 241 |
| 7 | 308 |
| 8 | 956 |
| 9 | 1472 |
| 10 | 1493 |
| 11 | 3181 |
| 12 | 3726 |
| 13 | 4176 |
| 14 | 23209 |
| 15 | 25718 |
| 16 | 32834 |
| 17 | 36989 |
| 18 | 103957 |
[0,1,2,12,228,241,308,956,1472,1493,3181,3726, 4176,23209,25718,32834,36989,103957] |