The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | -1 |
| 1 | 10 |
| 2 | 6 |
| 3 | 332 |
| 4 | 1498 |
| 5 | 29964 |
| 6 | 269660 |
| 7 | 4066456 |
| 8 | 48190842 |
| 9 | 679524828 |
| 10 | 8993585460 |
| 11 | 126419889960 |
| 12 | 1757062172580 |
| 13 | 25004701186680 |
| 14 | 356647387079160 |
| 15 | 5145713721249072 |
| 16 | 74607994412294970 |
| 17 | 1089344167433473788 |
| 18 | 15981504546211353156 |
| 19 | 235635552851036269704 |
[-1,10,6,332,1498,29964,269660,4066456,48190842, 679524828,8993585460,126419889960,1757062172580, 25004701186680,356647387079160,5145713721249072, 74607994412294970,1089344167433473788, 15981504546211353156,235635552851036269704] |