n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 4 |
3 | 9 |
4 | 21 |
5 | 49 |
6 | 114 |
7 | 265 |
8 | 615 |
9 | 1422 |
10 | 3272 |
11 | 7493 |
12 | 17090 |
13 | 38850 |
14 | 88065 |
15 | 199097 |
16 | 448953 |
17 | 1009788 |
18 | 2265642 |
19 | 5071611 |
20 | 11328395 |
21 | 25254093 |
22 | 56195143 |
23 | 124829822 |
24 | 276839061 |
25 | 612991848 |
26 | 1355268779 |
27 | 2992016128 |
28 | 6596222234 |
29 | 14522634554 |
30 | 31933047707 |
31 | 70130243427 |
[1,2,4,9,21,49,114,265,615,1422,3272,7493,17090, 38850,88065,199097,448953,1009788,2265642,5071611, 11328395,25254093,56195143,124829822,276839061, 612991848,1355268779,2992016128,6596222234, 14522634554,31933047707,70130243427] |