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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 3 |
| 3 | 2510 |
| 4 | 204315 |
| 5 | 3506973 |
| 6 | 31323420 |
| 7 | 172441114 |
| 8 | 754163531 |
| 9 | 2635150689 |
| 10 | 8018255136 |
| 11 | 21598367349 |
| 12 | 53416005414 |
| 13 | 121170850300 |
| 14 | 259822531797 |
| 15 | 525052338658 |
| 16 | 1012966664905 |
[0,3,2510,204315,3506973,31323420,172441114, 754163531,2635150689,8018255136,21598367349, 53416005414,121170850300,259822531797, 525052338658,1012966664905] |