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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 26 |
| 3 | 836 |
| 4 | 118304 |
| 5 | 56868928 |
| 6 | 77348401664 |
| 7 | 336344302104576 |
| 8 | 6256170906514948096 |
| 9 | 461016146852019430227968 |
| 10 | 101290253760680508433761304576 |
| 11 | 64552542594684734744030356172701696 |
[1,3,26,836,118304,56868928,77348401664, 336344302104576,6256170906514948096, 461016146852019430227968, 101290253760680508433761304576, 64552542594684734744030356172701696] |