n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 4 |
4 | 26 |
5 | 144 |
6 | 836 |
7 | 4784 |
8 | 27496 |
9 | 157824 |
10 | 906256 |
11 | 5203264 |
12 | 29875616 |
13 | 171535104 |
14 | 984896576 |
15 | 5654937344 |
16 | 32468715136 |
17 | 186424233984 |
18 | 1070384087296 |
19 | 6145778689024 |
20 | 35286955629056 |
21 | 202605609406464 |
22 | 1163291993916416 |
23 | 6679224069730304 |
24 | 38349816218085376 |
[0,1,4,26,144,836,4784,27496,157824,906256, 5203264,29875616,171535104,984896576,5654937344, 32468715136,186424233984,1070384087296, 6145778689024,35286955629056,202605609406464, 1163291993916416,6679224069730304, 38349816218085376] |