n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 8 |
4 | 15 |
5 | 34 |
6 | 70 |
7 | 162 |
8 | 388 |
9 | 1020 |
10 | 2729 |
11 | 7580 |
12 | 21112 |
13 | 59398 |
14 | 166990 |
15 | 471635 |
16 | 1332492 |
17 | 3776712 |
18 | 10721570 |
19 | 30518960 |
20 | 87046334 |
21 | 248852142 |
22 | 712831894 |
23 | 2045974474 |
24 | 5882821341 |
25 | 16943916873 |
26 | 48878646537 |
27 | 141209193981 |
[1,1,3,8,15,34,70,162,388,1020,2729,7580,21112, 59398,166990,471635,1332492,3776712,10721570, 30518960,87046334,248852142,712831894,2045974474, 5882821341,16943916873,48878646537,141209193981] |