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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 32 |
| 4 | 210 |
| 5 | 3594 |
| 6 | 37457 |
| 7 | 896412 |
| 8 | 12899520 |
| 9 | 398293065 |
| 10 | 7333821066 |
| 11 | 277832923686 |
| 12 | 6242376401170 |
| 13 | 280450554344037 |
| 14 | 7444127625398565 |
| 15 | 387040500799449256 |
| 16 | 11856077367530958400 |
| 17 | 700385265181462012083 |
| 18 | 24325550963621400151002 |
| 19 | 1609526297187139688483020 |
| 20 | 62510661428443938909212244 |
| 21 | 4579921704394565828797270344 |
| 22 | 196706096648058100149910675962 |
| 23 | 15809764480004991957201666377340 |
[1,3,32,210,3594,37457,896412,12899520,398293065, 7333821066,277832923686,6242376401170, 280450554344037,7444127625398565, 387040500799449256,11856077367530958400, 700385265181462012083,24325550963621400151002, 1609526297187139688483020, 62510661428443938909212244, 4579921704394565828797270344, 196706096648058100149910675962, 15809764480004991957201666377340] |