n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 12 |
3 | 18 |
4 | 62 |
5 | 420 |
6 | 682 |
7 | 5828 |
8 | 16852 |
9 | 61952 |
10 | 201184 |
11 | 669920 |
12 | 2184064 |
13 | 7126784 |
14 | 23147776 |
15 | 75118592 |
16 | 243460096 |
17 | 788658176 |
18 | 2553683968 |
19 | 8267055104 |
20 | 26758955008 |
21 | 86606348288 |
22 | 280288952320 |
23 | 907084169216 |
24 | 2935485890560 |
[1,2,12,18,62,420,682,5828,16852,61952,201184, 669920,2184064,7126784,23147776,75118592, 243460096,788658176,2553683968,8267055104, 26758955008,86606348288,280288952320,907084169216, 2935485890560] |