n | a(n) |
---|---|
2 | 1 |
3 | 18 |
4 | 276 |
5 | 4060 |
6 | 58905 |
7 | 850668 |
8 | 12271512 |
9 | 177100560 |
10 | 2558620845 |
11 | 37014131440 |
12 | 536211932256 |
13 | 7778680504140 |
14 | 112992892764570 |
15 | 1643385429346680 |
16 | 23929614612052080 |
17 | 348822899204435040 |
[1,18,276,4060,58905,850668,12271512,177100560, 2558620845,37014131440,536211932256,7778680504140, 112992892764570,1643385429346680, 23929614612052080,348822899204435040] |