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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 6 |
| 3 | 12 |
| 4 | 60 |
| 5 | 180 |
| 6 | 1260 |
| 7 | 2520 |
| 8 | 27720 |
| 9 | 83160 |
| 10 | 1081080 |
| 11 | 3603600 |
| 12 | 61261200 |
| 13 | 698377680 |
| 14 | 3491888400 |
| 15 | 80313433200 |
| 16 | 240940299600 |
| 17 | 1686582097200 |
| 18 | 48910880818800 |
| 19 | 1516237305382800 |
| 20 | 3032474610765600 |
| 21 | 112201560598327200 |
| 22 | 3066842656354276800 |
| 23 | 131874234223233902400 |
| 24 | 659371171116169512000 |
| 25 | 30990445042459967064000 |
[1,2,6,12,60,180,1260,2520,27720,83160,1081080, 3603600,61261200,698377680,3491888400,80313433200, 240940299600,1686582097200,48910880818800, 1516237305382800,3032474610765600, 112201560598327200,3066842656354276800, 131874234223233902400,659371171116169512000, 30990445042459967064000] |