n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 4 |
3 | 10 |
4 | 30 |
5 | 98 |
6 | 336 |
7 | 1194 |
8 | 4360 |
9 | 16258 |
10 | 61644 |
11 | 236938 |
12 | 921102 |
13 | 3615330 |
14 | 14307312 |
15 | 57024426 |
16 | 228701646 |
17 | 922283522 |
18 | 3737497980 |
19 | 15212318730 |
20 | 62160993642 |
21 | 254909413218 |
22 | 1048717979424 |
23 | 4327273358250 |
24 | 17903826642780 |
25 | 74260741616514 |
26 | 308724721176676 |
[1,2,4,10,30,98,336,1194,4360,16258,61644,236938, 921102,3615330,14307312,57024426,228701646, 922283522,3737497980,15212318730,62160993642, 254909413218,1048717979424,4327273358250, 17903826642780,74260741616514,308724721176676] |