n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 28 |
4 | 212 |
5 | 2664 |
6 | 56632 |
7 | 2052656 |
8 | 127902864 |
9 | 13721229088 |
10 | 2544826627424 |
11 | 815300788443072 |
12 | 452436459318538048 |
13 | 434188323928823259776 |
14 | 722197777341507864283008 |
15 | 2078153254879878944892861184 |
16 | 10366904326991986000747424911616 |
17 | 89478415088556766546699920236339712 |
18 | 1338962661056423158371347974009398601216 |
[1,2,6,28,212,2664,56632,2052656,127902864, 13721229088,2544826627424,815300788443072, 452436459318538048,434188323928823259776, 722197777341507864283008, 2078153254879878944892861184, 10366904326991986000747424911616, 89478415088556766546699920236339712, 1338962661056423158371347974009398601216] |