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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 168 |
| 3 | 33692 |
| 4 | 2131096 |
| 5 | 145363115 |
| 6 | 9186748436 |
| 7 | 549965063215 |
| 8 | 31917429718270 |
| 9 | 1806509121927104 |
| 10 | 100292418790888706 |
| 11 | 5482133225067484995 |
| 12 | 295856132450231057940 |
| 13 | 15796379749771179411410 |
| 14 | 835719466874948761627438 |
[0,168,33692,2131096,145363115,9186748436, 549965063215,31917429718270,1806509121927104, 100292418790888706,5482133225067484995, 295856132450231057940,15796379749771179411410, 835719466874948761627438] |