n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 19 |
5 | 62 |
6 | 206 |
7 | 694 |
8 | 2362 |
9 | 8101 |
10 | 27951 |
11 | 96905 |
12 | 337298 |
13 | 1177935 |
14 | 4125287 |
15 | 14482481 |
16 | 50950871 |
17 | 179584544 |
18 | 634020055 |
19 | 2241695805 |
20 | 7936423123 |
21 | 28131425351 |
[1,1,2,6,19,62,206,694,2362,8101,27951,96905, 337298,1177935,4125287,14482481,50950871, 179584544,634020055,2241695805,7936423123, 28131425351] |