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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 5 |
| 2 | 30 |
| 3 | 229 |
| 4 | 2165 |
| 5 | 24576 |
| 6 | 326515 |
| 7 | 4976315 |
| 8 | 85630914 |
| 9 | 1642623355 |
| 10 | 34762642871 |
| 11 | 804650577600 |
| 12 | 20224019536825 |
| 13 | 548535471681029 |
| 14 | 15969883030969470 |
| 15 | 496754110707779461 |
| 16 | 16441934503725675485 |
| 17 | 576991048929859964160 |
| 18 | 21399021201104749243099 |
| 19 | 836326710446071005267035 |
[1,5,30,229,2165,24576,326515,4976315,85630914, 1642623355,34762642871,804650577600, 20224019536825,548535471681029,15969883030969470, 496754110707779461,16441934503725675485, 576991048929859964160,21399021201104749243099, 836326710446071005267035] |