n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 16 |
4 | 50 |
5 | 184 |
6 | 810 |
7 | 3502 |
8 | 14751 |
9 | 63204 |
10 | 274824 |
11 | 1195748 |
12 | 5201911 |
13 | 22685592 |
14 | 99123373 |
15 | 433452835 |
16 | 1896510229 |
17 | 8302931200 |
18 | 36367291798 |
19 | 159341158550 |
20 | 698313973844 |
21 | 3060976848490 |
22 | 13419502926856 |
23 | 58838771883237 |
[1,4,16,50,184,810,3502,14751,63204,274824, 1195748,5201911,22685592,99123373,433452835, 1896510229,8302931200,36367291798,159341158550, 698313973844,3060976848490,13419502926856, 58838771883237] |