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A104256 as a simple table
| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 1 |
| 4 | 6 |
| 5 | 47 |
| 6 | 433 |
| 7 | 4826 |
| 8 | 63344 |
| 9 | 957206 |
| 10 | 16368226 |
| 11 | 312484331 |
| 12 | 6588211317 |
| 13 | 152035645781 |
| 14 | 3811750833515 |
| 15 | 103171389227156 |
| 16 | 2998418499414228 |
| 17 | 93127351040630156 |
| 18 | 3078376326065274609 |
| 19 | 107905191218919625781 |
[0,0,1,6,47,433,4826,63344,957206,16368226, 312484331,6588211317,152035645781,3811750833515, 103171389227156,2998418499414228, 93127351040630156,3078376326065274609, 107905191218919625781] |