n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 12 |
4 | 44 |
5 | 182 |
6 | 796 |
7 | 3612 |
8 | 16786 |
9 | 79426 |
10 | 381250 |
11 | 1851832 |
12 | 9086022 |
13 | 44970688 |
14 | 224279188 |
15 | 1126038472 |
16 | 5687027204 |
17 | 28873452032 |
18 | 147281732692 |
19 | 754443210294 |
[1,4,12,44,182,796,3612,16786,79426,381250, 1851832,9086022,44970688,224279188,1126038472, 5687027204,28873452032,147281732692,754443210294] |