n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 26 |
4 | 126 |
5 | 618 |
6 | 3022 |
7 | 14746 |
8 | 71902 |
9 | 350538 |
10 | 1708910 |
11 | 8331130 |
12 | 40615294 |
13 | 198004778 |
14 | 965298958 |
15 | 4705957722 |
16 | 22942154782 |
17 | 111845982474 |
18 | 545263681710 |
19 | 2658231220538 |
20 | 12959222223038 |
21 | 63177890368490 |
22 | 308000415667278 |
23 | 1501542003033370 |
[1,2,6,26,126,618,3022,14746,71902,350538,1708910, 8331130,40615294,198004778,965298958,4705957722, 22942154782,111845982474,545263681710, 2658231220538,12959222223038,63177890368490, 308000415667278,1501542003033370] |