n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 14 |
3 | 54 |
4 | 185 |
5 | 619 |
6 | 2027 |
7 | 6553 |
8 | 21044 |
9 | 67231 |
10 | 214122 |
11 | 680330 |
12 | 2158391 |
13 | 6840384 |
14 | 21663503 |
15 | 68575557 |
16 | 217004842 |
17 | 686552743 |
18 | 2171766332 |
19 | 6869227848 |
20 | 21725636644 |
21 | 68709456167 |
22 | 217293374285 |
23 | 687174291753 |
24 | 2173105517385 |
25 | 6872112993377 |
26 | 21731852479862 |
27 | 68722847672629 |
28 | 217322225558934 |
29 | 687236449779456 |
30 | 2173239433013146 |
[1,4,14,54,185,619,2027,6553,21044,67231,214122, 680330,2158391,6840384,21663503,68575557, 217004842,686552743,2171766332,6869227848, 21725636644,68709456167,217293374285,687174291753, 2173105517385,6872112993377,21731852479862, 68722847672629,217322225558934,687236449779456, 2173239433013146] |