n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 6 |
4 | 12 |
5 | 24 |
6 | 54 |
7 | 108 |
8 | 246 |
9 | 510 |
10 | 1218 |
11 | 2742 |
12 | 6930 |
13 | 16242 |
14 | 47706 |
15 | 144018 |
16 | 672732 |
17 | 2756124 |
18 | 5656266 |
19 | 27943404 |
20 | 75554226 |
21 | 661653378 |
22 | 1323306756 |
[1,2,6,12,24,54,108,246,510,1218,2742,6930,16242, 47706,144018,672732,2756124,5656266,27943404, 75554226,661653378,1323306756] |