n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 12 |
3 | 36 |
4 | 100 |
5 | 264 |
6 | 676 |
7 | 1684 |
8 | 4096 |
9 | 9764 |
10 | 22888 |
11 | 52872 |
12 | 120540 |
13 | 271600 |
14 | 605556 |
15 | 1337320 |
16 | 2927720 |
17 | 6358432 |
18 | 13707916 |
19 | 29351536 |
20 | 62450468 |
21 | 132090356 |
22 | 277845120 |
23 | 581405140 |
24 | 1210688864 |
25 | 2509483020 |
26 | 5178969644 |
27 | 10644112012 |
28 | 21790816340 |
29 | 44444609044 |
[1,4,12,36,100,264,676,1684,4096,9764,22888,52872, 120540,271600,605556,1337320,2927720,6358432, 13707916,29351536,62450468,132090356,277845120, 581405140,1210688864,2509483020,5178969644, 10644112012,21790816340,44444609044] |