n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 7 |
4 | 18 |
5 | 46 |
6 | 118 |
7 | 303 |
8 | 778 |
9 | 1998 |
10 | 5131 |
11 | 13177 |
12 | 33840 |
13 | 86905 |
14 | 223182 |
15 | 573157 |
16 | 1471933 |
17 | 3780093 |
18 | 9707713 |
19 | 24930522 |
20 | 64024444 |
21 | 164422126 |
22 | 422254905 |
23 | 1084399096 |
24 | 2784861432 |
25 | 7151844025 |
26 | 18366756913 |
27 | 47167941348 |
28 | 121132691065 |
[1,1,3,7,18,46,118,303,778,1998,5131,13177,33840, 86905,223182,573157,1471933,3780093,9707713, 24930522,64024444,164422126,422254905,1084399096, 2784861432,7151844025,18366756913,47167941348, 121132691065] |