n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 18 |
4 | 96 |
5 | 624 |
6 | 4896 |
7 | 45072 |
8 | 474624 |
9 | 5619456 |
10 | 73903104 |
11 | 1069106688 |
12 | 16872800256 |
13 | 288483876864 |
14 | 5311773904896 |
15 | 104789944829952 |
16 | 2205099306123264 |
17 | 49302137885884416 |
18 | 1167150882577711104 |
19 | 29165495002777387008 |
20 | 767163772371852066816 |
21 | 21188300138891474632704 |
[1,4,18,96,624,4896,45072,474624,5619456,73903104, 1069106688,16872800256,288483876864,5311773904896, 104789944829952,2205099306123264, 49302137885884416,1167150882577711104, 29165495002777387008,767163772371852066816, 21188300138891474632704] |