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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 16 |
| 3 | 187 |
| 4 | 4181 |
| 5 | 158484 |
| 6 | 9573673 |
| 7 | 887796203 |
| 8 | 123095499826 |
| 9 | 25013843421773 |
| 10 | 7332464142932061 |
| 11 | 3060854010476035118 |
| 12 | 1800064413234246359355 |
| 13 | 1477862758280253372432667 |
| 14 | 1680717420907850482529235664 |
[1,3,16,187,4181,158484,9573673,887796203, 123095499826,25013843421773,7332464142932061, 3060854010476035118,1800064413234246359355, 1477862758280253372432667, 1680717420907850482529235664] |