n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 4 |
3 | 11 |
4 | 30 |
5 | 83 |
6 | 236 |
7 | 691 |
8 | 2050 |
9 | 6123 |
10 | 18336 |
11 | 54971 |
12 | 164870 |
13 | 494563 |
14 | 1483636 |
15 | 4450851 |
16 | 13352490 |
17 | 40057403 |
18 | 120172136 |
19 | 360516331 |
20 | 1081548910 |
21 | 3244646643 |
22 | 9733939836 |
23 | 29201819411 |
24 | 87605458130 |
25 | 262816374283 |
26 | 788449122736 |
27 | 2365347368091 |
28 | 7096042104150 |
[0,1,4,11,30,83,236,691,2050,6123,18336,54971, 164870,494563,1483636,4450851,13352490,40057403, 120172136,360516331,1081548910,3244646643, 9733939836,29201819411,87605458130,262816374283, 788449122736,2365347368091,7096042104150] |