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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 153 |
| 3 | 5013 |
| 4 | 196726 |
| 5 | 7974561 |
| 6 | 329985827 |
| 7 | 13538466880 |
| 8 | 556397458939 |
| 9 | 22855524139957 |
| 10 | 939108990106903 |
| 11 | 38582376309904861 |
| 12 | 1585188853495876230 |
| 13 | 65127697958640926840 |
| 14 | 2675798844803131047876 |
| 15 | 109936009766691550151969 |
[0,153,5013,196726,7974561,329985827,13538466880, 556397458939,22855524139957,939108990106903, 38582376309904861,1585188853495876230, 65127697958640926840,2675798844803131047876, 109936009766691550151969] |