n | a(n) |
---|---|
1 | 2 |
2 | 4 |
3 | 18 |
4 | 44 |
5 | 184 |
6 | 444 |
7 | 1826 |
8 | 4388 |
9 | 18022 |
10 | 43300 |
11 | 177856 |
12 | 427348 |
13 | 1755406 |
14 | 4217900 |
15 | 17325794 |
16 | 41630540 |
17 | 171004968 |
18 | 410891868 |
19 | 1687812450 |
20 | 4055486788 |
21 | 16658643286 |
22 | 40027496964 |
23 | 164420161936 |
24 | 395069839924 |
25 | 1622820610830 |
26 | 3899323972492 |
[2,4,18,44,184,444,1826,4388,18022,43300,177856, 427348,1755406,4217900,17325794,41630540, 171004968,410891868,1687812450,4055486788, 16658643286,40027496964,164420161936,395069839924, 1622820610830,3899323972492] |