n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 16 |
4 | 79 |
5 | 443 |
6 | 2968 |
7 | 22216 |
8 | 189698 |
9 | 1792402 |
10 | 18745036 |
11 | 213452996 |
12 | 2653142952 |
13 | 35448861576 |
14 | 509724975264 |
15 | 7824794618208 |
16 | 128006170541328 |
17 | 2217950478978576 |
18 | 40686737647774368 |
19 | 785852762719168992 |
20 | 15974195890305405696 |
21 | 340376906088298319616 |
[1,4,16,79,443,2968,22216,189698,1792402,18745036, 213452996,2653142952,35448861576,509724975264, 7824794618208,128006170541328,2217950478978576, 40686737647774368,785852762719168992, 15974195890305405696,340376906088298319616] |