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A060090 as a simple table
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 3 |
| 3 | 23 |
| 4 | 290 |
| 5 | 4298 |
| 6 | 79143 |
| 7 | 1702923 |
| 8 | 42299820 |
| 9 | 1188147639 |
| 10 | 37276597020 |
| 11 | 1291633545897 |
| 12 | 48995506718702 |
| 13 | 2019395409175529 |
| 14 | 89864601931874318 |
| 15 | 4294295828157319651 |
| 16 | 219321170795303112118 |
| 17 | 11922219151375200468886 |
[1,0,3,23,290,4298,79143,1702923,42299820, 1188147639,37276597020,1291633545897, 48995506718702,2019395409175529,89864601931874318, 4294295828157319651,219321170795303112118, 11922219151375200468886] |