n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 9 |
3 | 41 |
4 | 143 |
5 | 442 |
6 | 1260 |
7 | 3113 |
8 | 7331 |
9 | 15969 |
10 | 32737 |
11 | 63942 |
12 | 120318 |
13 | 216392 |
14 | 377902 |
15 | 640970 |
16 | 1055829 |
17 | 1699241 |
18 | 2679576 |
19 | 4132842 |
20 | 6267048 |
21 | 9345121 |
22 | 13712218 |
23 | 19841970 |
24 | 28343579 |
25 | 39963063 |
26 | 55722233 |
27 | 76873873 |
28 | 104958237 |
29 | 141966994 |
30 | 190366323 |
31 | 253040267 |
32 | 333758897 |
[1,1,9,41,143,442,1260,3113,7331,15969,32737, 63942,120318,216392,377902,640970,1055829,1699241, 2679576,4132842,6267048,9345121,13712218,19841970, 28343579,39963063,55722233,76873873,104958237, 141966994,190366323,253040267,333758897] |