n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 12 |
3 | 42 |
4 | 144 |
5 | 499 |
6 | 1728 |
7 | 5986 |
8 | 20736 |
9 | 71832 |
10 | 248832 |
11 | 861979 |
12 | 2985984 |
13 | 10343752 |
14 | 35831808 |
15 | 124125024 |
16 | 429981696 |
17 | 1489500288 |
18 | 5159780352 |
19 | 17874003451 |
20 | 61917364224 |
21 | 214488041413 |
22 | 743008370688 |
[1,3,12,42,144,499,1728,5986,20736,71832,248832, 861979,2985984,10343752,35831808,124125024, 429981696,1489500288,5159780352,17874003451, 61917364224,214488041413,743008370688] |