n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 4 |
4 | 9 |
5 | 20 |
6 | 49 |
7 | 117 |
8 | 297 |
9 | 746 |
10 | 1947 |
11 | 5021 |
12 | 13378 |
13 | 35237 |
14 | 95123 |
15 | 254825 |
16 | 694987 |
17 | 1882707 |
18 | 5184391 |
19 | 14177587 |
20 | 39289183 |
21 | 108337723 |
22 | 301997384 |
23 | 837774846 |
24 | 2347293253 |
25 | 6546903307 |
26 | 18417850843 |
27 | 51617715836 |
28 | 145722478875 |
29 | 409964137081 |
30 | 1161300892672 |
[1,1,2,4,9,20,49,117,297,746,1947,5021,13378, 35237,95123,254825,694987,1882707,5184391, 14177587,39289183,108337723,301997384,837774846, 2347293253,6546903307,18417850843,51617715836, 145722478875,409964137081,1161300892672] |