n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 19 |
4 | 62 |
5 | 207 |
6 | 704 |
7 | 2430 |
8 | 8486 |
9 | 29903 |
10 | 106098 |
11 | 378391 |
12 | 1354700 |
13 | 4863834 |
14 | 17499302 |
15 | 63055947 |
16 | 227465414 |
17 | 821215295 |
18 | 2966571096 |
19 | 10721076118 |
20 | 38757594758 |
21 | 140143505031 |
22 | 506827217210 |
23 | 1833150646599 |
[1,2,6,19,62,207,704,2430,8486,29903,106098, 378391,1354700,4863834,17499302,63055947, 227465414,821215295,2966571096,10721076118, 38757594758,140143505031,506827217210, 1833150646599] |