n | a(n) |
---|---|
0 | 0 |
1 | 6 |
2 | 72 |
3 | 648 |
4 | 5184 |
5 | 38880 |
6 | 279936 |
7 | 1959552 |
8 | 13436928 |
9 | 90699264 |
10 | 604661760 |
11 | 3990767616 |
12 | 26121388032 |
13 | 169789022208 |
14 | 1097098297344 |
15 | 7052774768640 |
16 | 45137758519296 |
17 | 287753210560512 |
18 | 1828079220031488 |
19 | 11577835060199424 |
20 | 73123168801259520 |
21 | 460675963447934976 |
[0,6,72,648,5184,38880,279936,1959552,13436928, 90699264,604661760,3990767616,26121388032, 169789022208,1097098297344,7052774768640, 45137758519296,287753210560512,1828079220031488, 11577835060199424,73123168801259520, 460675963447934976] |