n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 4 |
4 | 9 |
5 | 21 |
6 | 48 |
7 | 112 |
8 | 263 |
9 | 623 |
10 | 1484 |
11 | 3550 |
12 | 8525 |
13 | 20537 |
14 | 49612 |
15 | 120136 |
16 | 291519 |
17 | 708699 |
18 | 1725714 |
19 | 4208364 |
20 | 10276173 |
21 | 25122829 |
22 | 61486180 |
23 | 150632012 |
24 | 369361757 |
25 | 906462529 |
26 | 2226297008 |
27 | 5471757126 |
28 | 13457326605 |
29 | 33117622245 |
30 | 81547372396 |
[1,1,2,4,9,21,48,112,263,623,1484,3550,8525,20537, 49612,120136,291519,708699,1725714,4208364, 10276173,25122829,61486180,150632012,369361757, 906462529,2226297008,5471757126,13457326605, 33117622245,81547372396] |