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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 5985 |
| 8 | 13112470 |
| 9 | 8535294180 |
| 10 | 3096620034795 |
| 11 | 800118566011380 |
| 12 | 166591475854153740 |
| 13 | 30012638793107746776 |
| 14 | 4892304538906805158775 |
| 15 | 743352352817243899253160 |
| 16 | 107478174967432322995403280 |
| 17 | 15008321493306766503800761840 |
| 18 | 2046331888629918743459557040544 |
[0,0,0,0,0,0,5985,13112470,8535294180, 3096620034795,800118566011380,166591475854153740, 30012638793107746776,4892304538906805158775, 743352352817243899253160, 107478174967432322995403280, 15008321493306766503800761840, 2046331888629918743459557040544] |