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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 312 |
| 3 | 107604 |
| 4 | 39073568 |
| 5 | 14645965026 |
| 6 | 5609733423408 |
| 7 | 2182717163349896 |
| 8 | 859521859502348352 |
| 9 | 341679883727799750159 |
| 10 | 136868519056531319862408 |
| 11 | 55173969942211048781835468 |
| 12 | 22360181278518828446785034976 |
| 13 | 9103073677708423854325869548662 |
[0,1,312,107604,39073568,14645965026, 5609733423408,2182717163349896,859521859502348352, 341679883727799750159,136868519056531319862408, 55173969942211048781835468, 22360181278518828446785034976, 9103073677708423854325869548662] |