n | a(n) |
---|---|
0 | 1 |
1 | 5 |
2 | 21 |
3 | 81 |
4 | 313 |
5 | 1213 |
6 | 4701 |
7 | 18217 |
8 | 70593 |
9 | 273557 |
10 | 1060069 |
11 | 4107905 |
12 | 15918665 |
13 | 61686893 |
14 | 239044717 |
15 | 926329305 |
16 | 3589646289 |
17 | 13910345285 |
18 | 53904393461 |
19 | 208886521137 |
20 | 809462381657 |
21 | 3136771792413 |
22 | 12155397830269 |
23 | 47103744291977 |
24 | 182533122922465 |
25 | 707339543058421 |
26 | 2741032537895173 |
27 | 10621856854367201 |
[1,5,21,81,313,1213,4701,18217,70593,273557, 1060069,4107905,15918665,61686893,239044717, 926329305,3589646289,13910345285,53904393461, 208886521137,809462381657,3136771792413, 12155397830269,47103744291977,182533122922465, 707339543058421,2741032537895173, 10621856854367201] |