n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 4 |
4 | 10 |
5 | 26 |
6 | 80 |
7 | 272 |
8 | 1076 |
9 | 4848 |
10 | 24832 |
11 | 142340 |
12 | 902440 |
13 | 6257264 |
14 | 47042924 |
15 | 380800060 |
16 | 3300070116 |
17 | 30472353884 |
18 | 298595442140 |
[1,1,2,4,10,26,80,272,1076,4848,24832,142340, 902440,6257264,47042924,380800060,3300070116, 30472353884,298595442140] |