n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 7 |
4 | 25 |
5 | 102 |
6 | 432 |
7 | 1924 |
8 | 8808 |
9 | 41351 |
10 | 197674 |
11 | 959589 |
12 | 4716069 |
13 | 23422164 |
14 | 117360162 |
15 | 592567469 |
16 | 3011916144 |
17 | 15398787232 |
18 | 79136540960 |
19 | 408574756618 |
20 | 2118185640135 |
21 | 11022473614333 |
22 | 57552696735994 |
23 | 301434573308538 |
[1,1,2,7,25,102,432,1924,8808,41351,197674,959589, 4716069,23422164,117360162,592567469,3011916144, 15398787232,79136540960,408574756618, 2118185640135,11022473614333,57552696735994, 301434573308538] |