n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 21 |
4 | 82 |
5 | 356 |
6 | 1690 |
7 | 8731 |
8 | 48213 |
9 | 281885 |
10 | 1724817 |
11 | 10955956 |
12 | 71747613 |
13 | 481927039 |
14 | 3306721747 |
15 | 23103546417 |
16 | 163954719933 |
17 | 1179368199427 |
18 | 8584854507319 |
19 | 63150696347462 |
20 | 468906907743356 |
21 | 3511055861792836 |
22 | 26489459993078577 |
23 | 201226384388401603 |
[1,2,6,21,82,356,1690,8731,48213,281885,1724817, 10955956,71747613,481927039,3306721747, 23103546417,163954719933,1179368199427, 8584854507319,63150696347462,468906907743356, 3511055861792836,26489459993078577, 201226384388401603] |