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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 19684 |
| 3 | 1953126 |
| 4 | 40353608 |
| 5 | 387440173 |
| 6 | 2357947692 |
| 7 | 10604499374 |
| 8 | 38445332184 |
| 9 | 118587876498 |
| 10 | 322687697780 |
| 11 | 794320419872 |
| 12 | 1801152661464 |
| 13 | 3814699218751 |
| 14 | 7625984925160 |
| 15 | 14507145975870 |
| 16 | 26439622160672 |
| 17 | 46413842369328 |
[1,19684,1953126,40353608,387440173,2357947692, 10604499374,38445332184,118587876498,322687697780, 794320419872,1801152661464,3814699218751, 7625984925160,14507145975870,26439622160672, 46413842369328] |