n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 17 |
3 | 65 |
4 | 234 |
5 | 804 |
6 | 2664 |
7 | 8571 |
8 | 26908 |
9 | 82721 |
10 | 249758 |
11 | 742178 |
12 | 2174623 |
13 | 6291982 |
14 | 17998815 |
15 | 50957814 |
16 | 142913510 |
17 | 397339309 |
18 | 1095887091 |
19 | 3000130003 |
20 | 8156568197 |
21 | 22032636494 |
22 | 59155443318 |
23 | 157925193036 |
24 | 419353166885 |
25 | 1107924552070 |
[1,4,17,65,234,804,2664,8571,26908,82721,249758, 742178,2174623,6291982,17998815,50957814, 142913510,397339309,1095887091,3000130003, 8156568197,22032636494,59155443318,157925193036, 419353166885,1107924552070] |