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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 3 |
| 4 | 15 |
| 5 | 15 |
| 6 | 224 |
| 7 | 224 |
| 8 | 4095 |
| 9 | 76544 |
| 10 | 512000 |
| 11 | 9511424 |
| 12 | 20916224 |
| 13 | 410572799 |
| 14 | 672358400 |
| 15 | 2985984000 |
| 16 | 1004293914624 |
| 17 | 1004293914624 |
| 18 | 78942076928000 |
| 19 | 610877575397375 |
| 20 | 83179139563520000 |
| 21 | 490473044848410624 |
| 22 | 6878928869130239999 |
| 23 | 185974097225789210624 |
| 24 | 1708887984313466880000 |
| 25 | 68817755280574852890624 |
[1,3,3,15,15,224,224,4095,76544,512000,9511424, 20916224,410572799,672358400,2985984000, 1004293914624,1004293914624,78942076928000, 610877575397375,83179139563520000, 490473044848410624,6878928869130239999, 185974097225789210624,1708887984313466880000, 68817755280574852890624] |