n | a(n) |
---|---|
1 | 2 |
2 | 4 |
3 | 14 |
4 | 52 |
5 | 214 |
6 | 916 |
7 | 4116 |
8 | 18996 |
9 | 89894 |
10 | 433196 |
11 | 2119904 |
12 | 10503612 |
13 | 52594476 |
14 | 265713532 |
15 | 1352796790 |
16 | 6933598208 |
17 | 35747017596 |
18 | 185260197772 |
19 | 964585369012 |
20 | 5043220350012 |
21 | 26467146038744 |
22 | 139375369621960 |
23 | 736229024863276 |
24 | 3900074570513316 |
25 | 20714056652990194 |
[2,4,14,52,214,916,4116,18996,89894,433196, 2119904,10503612,52594476,265713532,1352796790, 6933598208,35747017596,185260197772,964585369012, 5043220350012,26467146038744,139375369621960, 736229024863276,3900074570513316, 20714056652990194] |