n | a(n) |
---|---|
1 | 0 |
2 | 36 |
3 | 252 |
4 | 1548 |
5 | 9324 |
6 | 55980 |
7 | 335916 |
8 | 2015532 |
9 | 12093228 |
10 | 72559404 |
11 | 435356460 |
12 | 2612138796 |
13 | 15672832812 |
14 | 94036996908 |
15 | 564221981484 |
16 | 3385331888940 |
17 | 20311991333676 |
18 | 121871948002092 |
19 | 731231688012588 |
20 | 4387390128075564 |
21 | 26324340768453420 |
[0,36,252,1548,9324,55980,335916,2015532,12093228, 72559404,435356460,2612138796,15672832812, 94036996908,564221981484,3385331888940, 20311991333676,121871948002092,731231688012588, 4387390128075564,26324340768453420] |