n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 1 |
4 | 3 |
5 | 4 |
6 | 12 |
7 | 27 |
8 | 82 |
9 | 228 |
10 | 733 |
11 | 2282 |
12 | 7528 |
13 | 24834 |
14 | 83898 |
15 | 285357 |
16 | 983244 |
17 | 3412420 |
18 | 11944614 |
19 | 42080170 |
20 | 149197152 |
21 | 531883768 |
22 | 1905930975 |
23 | 6861221666 |
24 | 24806004996 |
25 | 90036148954 |
26 | 327989004892 |
27 | 1198854697588 |
28 | 4395801203290 |
29 | 16165198379984 |
30 | 59609171366326 |
31 | 220373278174641 |
[1,1,1,3,4,12,27,82,228,733,2282,7528,24834,83898, 285357,983244,3412420,11944614,42080170,149197152, 531883768,1905930975,6861221666,24806004996, 90036148954,327989004892,1198854697588, 4395801203290,16165198379984,59609171366326, 220373278174641] |