n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 8 |
4 | 25 |
5 | 83 |
6 | 289 |
7 | 1041 |
8 | 3847 |
9 | 14504 |
10 | 55569 |
11 | 215727 |
12 | 846761 |
13 | 3354858 |
14 | 13398965 |
15 | 53888063 |
16 | 218053915 |
17 | 887107888 |
18 | 3626373205 |
19 | 14887942624 |
20 | 61358959587 |
21 | 253771944529 |
22 | 1052917272543 |
23 | 4381374717994 |
24 | 18280470530047 |
25 | 76459765772375 |
[1,1,3,8,25,83,289,1041,3847,14504,55569,215727, 846761,3354858,13398965,53888063,218053915, 887107888,3626373205,14887942624,61358959587, 253771944529,1052917272543,4381374717994, 18280470530047,76459765772375] |