n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 23 |
5 | 103 |
6 | 512 |
7 | 2740 |
8 | 15485 |
9 | 91245 |
10 | 555662 |
11 | 3475090 |
12 | 22214707 |
13 | 144640291 |
14 | 956560748 |
15 | 6411521056 |
16 | 43478151737 |
17 | 297864793993 |
18 | 2059159989914 |
19 | 14350039389022 |
20 | 100726680316559 |
21 | 711630547589023 |
22 | 5057282786190872 |
23 | 36132861123763276 |
24 | 259423620328055093 |
[1,1,2,6,23,103,512,2740,15485,91245,555662, 3475090,22214707,144640291,956560748,6411521056, 43478151737,297864793993,2059159989914, 14350039389022,100726680316559,711630547589023, 5057282786190872,36132861123763276, 259423620328055093] |