n | a(n) |
---|---|
1 | 4 |
2 | 13 |
3 | 64 |
4 | 230 |
5 | 1012 |
6 | 3928 |
7 | 16428 |
8 | 65736 |
9 | 269908 |
10 | 1091720 |
11 | 4454304 |
12 | 18082796 |
13 | 73622676 |
14 | 299247292 |
15 | 1217498296 |
16 | 4950677020 |
17 | 20137255328 |
18 | 81894658192 |
19 | 333086633092 |
20 | 1354665687204 |
21 | 5509630157292 |
22 | 22408041160240 |
23 | 91136102570276 |
[4,13,64,230,1012,3928,16428,65736,269908,1091720, 4454304,18082796,73622676,299247292,1217498296, 4950677020,20137255328,81894658192,333086633092, 1354665687204,5509630157292,22408041160240, 91136102570276] |