n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 12 |
3 | 112 |
4 | 1408 |
5 | 22144 |
6 | 417216 |
7 | 9148416 |
8 | 228649472 |
9 | 6412193280 |
10 | 199301663744 |
11 | 6798026395648 |
12 | 252397715738624 |
13 | 10131114555244544 |
14 | 437100940892913664 |
15 | 20169428831476678656 |
16 | 991081906535967948800 |
17 | 51662621871173444698112 |
18 | 2847287574653833612623872 |
[1,2,12,112,1408,22144,417216,9148416,228649472, 6412193280,199301663744,6798026395648, 252397715738624,10131114555244544, 437100940892913664,20169428831476678656, 991081906535967948800,51662621871173444698112, 2847287574653833612623872] |