n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 4 |
3 | 19 |
4 | 88 |
5 | 409 |
6 | 1900 |
7 | 8827 |
8 | 41008 |
9 | 190513 |
10 | 885076 |
11 | 4111843 |
12 | 19102600 |
13 | 88745929 |
14 | 412291516 |
15 | 1915403851 |
16 | 8898489952 |
17 | 41340171361 |
18 | 192056155300 |
19 | 892245135283 |
20 | 4145149007032 |
21 | 19257331433977 |
22 | 89464772757004 |
[0,1,4,19,88,409,1900,8827,41008,190513,885076, 4111843,19102600,88745929,412291516,1915403851, 8898489952,41340171361,192056155300,892245135283, 4145149007032,19257331433977,89464772757004] |