n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 12 |
3 | 36 |
4 | 108 |
5 | 324 |
6 | 972 |
7 | 2916 |
8 | 8748 |
9 | 26244 |
10 | 78732 |
11 | 236196 |
12 | 708588 |
13 | 2125758 |
14 | 6377256 |
15 | 19131720 |
16 | 57395016 |
17 | 172184616 |
18 | 516552552 |
19 | 1549653768 |
20 | 4648949640 |
21 | 13946813928 |
22 | 41840336808 |
23 | 125520695496 |
24 | 376561141704 |
25 | 1129680590760 |
[1,4,12,36,108,324,972,2916,8748,26244,78732, 236196,708588,2125758,6377256,19131720,57395016, 172184616,516552552,1549653768,4648949640, 13946813928,41840336808,125520695496,376561141704, 1129680590760] |