n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 19 |
3 | 82 |
4 | 325 |
5 | 1216 |
6 | 4375 |
7 | 15310 |
8 | 52489 |
9 | 177148 |
10 | 590491 |
11 | 1948618 |
12 | 6377293 |
13 | 20726200 |
14 | 66961567 |
15 | 215233606 |
16 | 688747537 |
17 | 2195382772 |
18 | 6973568803 |
19 | 22082967874 |
20 | 69735688021 |
21 | 219667417264 |
22 | 690383311399 |
23 | 2165293113022 |
24 | 6778308875545 |
25 | 21182215236076 |
26 | 66088511536555 |
27 | 205891132094650 |
[1,4,19,82,325,1216,4375,15310,52489,177148, 590491,1948618,6377293,20726200,66961567, 215233606,688747537,2195382772,6973568803, 22082967874,69735688021,219667417264,690383311399, 2165293113022,6778308875545,21182215236076, 66088511536555,205891132094650] |