n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 17 |
3 | 75 |
4 | 338 |
5 | 1541 |
6 | 7069 |
7 | 32532 |
8 | 149965 |
9 | 691903 |
10 | 3193706 |
11 | 14745009 |
12 | 68084297 |
13 | 314394980 |
14 | 1451837593 |
15 | 6704518371 |
16 | 30961415074 |
17 | 142980203437 |
18 | 660285858245 |
19 | 3049218769908 |
20 | 14081386948661 |
21 | 65028302171639 |
22 | 300302858766202 |
23 | 1386808687475385 |
24 | 6404329365899473 |
[1,4,17,75,338,1541,7069,32532,149965,691903, 3193706,14745009,68084297,314394980,1451837593, 6704518371,30961415074,142980203437,660285858245, 3049218769908,14081386948661,65028302171639, 300302858766202,1386808687475385,6404329365899473] |