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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 89 |
| 3 | 1278 |
| 4 | 33636 |
| 5 | 715072 |
| 6 | 16350693 |
| 7 | 364647622 |
| 8 | 8201909757 |
| 9 | 183947396032 |
| 10 | 4129523869606 |
| 11 | 92675094208964 |
| 12 | 2080048909984067 |
| 13 | 46684042670495080 |
| 14 | 1047776070980376086 |
| 15 | 23516183336037445861 |
| 16 | 527795545850035568780 |
| 17 | 11845801476106616135344 |
[1,1,89,1278,33636,715072,16350693,364647622, 8201909757,183947396032,4129523869606, 92675094208964,2080048909984067,46684042670495080, 1047776070980376086,23516183336037445861, 527795545850035568780,11845801476106616135344] |