n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 17 |
3 | 73 |
4 | 314 |
5 | 1351 |
6 | 5813 |
7 | 25012 |
8 | 107621 |
9 | 463069 |
10 | 1992482 |
11 | 8573203 |
12 | 36888569 |
13 | 158723236 |
14 | 682950473 |
15 | 2938582657 |
16 | 12644061866 |
17 | 54404561359 |
18 | 234090621197 |
19 | 1007239421908 |
20 | 4333925245949 |
21 | 18647907964021 |
22 | 80237764082258 |
23 | 345245096519227 |
24 | 1485512190349361 |
[1,4,17,73,314,1351,5813,25012,107621,463069, 1992482,8573203,36888569,158723236,682950473, 2938582657,12644061866,54404561359,234090621197, 1007239421908,4333925245949,18647907964021, 80237764082258,345245096519227,1485512190349361] |