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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 1 |
| 3 | 6 |
| 4 | 267 |
| 5 | 5050 |
| 6 | 520598 |
| 7 | 20713252 |
| 8 | 3891019939 |
| 9 | 266156640474 |
| 10 | 79482588671154 |
| 11 | 8325744599377260 |
| 12 | 3624674791200639406 |
| 13 | 539424704140269574276 |
| 14 | 322575897023940844552204 |
| 15 | 64712722269670777415835976 |
| 16 | 50899350828638565957558873763 |
| 17 | 13240165399882959143766305222394 |
[1,0,1,6,267,5050,520598,20713252,3891019939, 266156640474,79482588671154,8325744599377260, 3624674791200639406,539424704140269574276, 322575897023940844552204, 64712722269670777415835976, 50899350828638565957558873763, 13240165399882959143766305222394] |