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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 2 |
| 3 | 3 |
| 4 | 76 |
| 5 | 425 |
| 6 | 10326 |
| 7 | 119077 |
| 8 | 3158968 |
| 9 | 57929265 |
| 10 | 1740086290 |
| 11 | 44066266541 |
| 12 | 1512768107940 |
| 13 | 48660920528233 |
| 14 | 1905202422005806 |
| 15 | 73878129769929045 |
| 16 | 3275941116578461936 |
| 17 | 147981592692778718561 |
| 18 | 7366814796135956094378 |
| 19 | 378666415166758834858237 |
[1,0,2,3,76,425,10326,119077,3158968,57929265, 1740086290,44066266541,1512768107940, 48660920528233,1905202422005806,73878129769929045, 3275941116578461936,147981592692778718561, 7366814796135956094378,378666415166758834858237] |