n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 4 |
3 | 9 |
4 | 23 |
5 | 59 |
6 | 155 |
7 | 429 |
8 | 1188 |
9 | 3298 |
10 | 9181 |
11 | 25634 |
12 | 71781 |
13 | 201569 |
14 | 571795 |
15 | 1639244 |
16 | 4702499 |
17 | 13500396 |
18 | 38790727 |
19 | 111555296 |
20 | 321100627 |
21 | 925086012 |
22 | 2667533646 |
23 | 7698716068 |
24 | 22238169212 |
25 | 64473303788 |
26 | 187912261301 |
27 | 547850119836 |
[1,2,4,9,23,59,155,429,1188,3298,9181,25634,71781, 201569,571795,1639244,4702499,13500396,38790727, 111555296,321100627,925086012,2667533646, 7698716068,22238169212,64473303788,187912261301, 547850119836] |