n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 7 |
4 | 38 |
5 | 291 |
6 | 2932 |
7 | 36961 |
8 | 561948 |
9 | 10026505 |
10 | 205608536 |
11 | 4767440679 |
12 | 123373203208 |
13 | 3525630110107 |
14 | 110284283006640 |
15 | 3748357699560961 |
16 | 137557910094840848 |
17 | 5421179050350334929 |
18 | 228359487335194570528 |
19 | 10239206473040881277575 |
20 | 486909744862576654283616 |
[1,1,2,7,38,291,2932,36961,561948,10026505, 205608536,4767440679,123373203208,3525630110107, 110284283006640,3748357699560961, 137557910094840848,5421179050350334929, 228359487335194570528,10239206473040881277575, 486909744862576654283616] |