n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 3 |
5 | 4 |
6 | 9 |
7 | 15 |
8 | 22 |
9 | 52 |
10 | 91 |
11 | 140 |
12 | 340 |
13 | 612 |
14 | 969 |
15 | 2394 |
16 | 4389 |
17 | 7084 |
18 | 17710 |
19 | 32890 |
20 | 53820 |
21 | 135720 |
22 | 254475 |
23 | 420732 |
24 | 1068012 |
25 | 2017356 |
26 | 3362260 |
27 | 8579560 |
28 | 16301164 |
29 | 27343888 |
30 | 70068713 |
[1,1,1,2,3,4,9,15,22,52,91,140,340,612,969,2394, 4389,7084,17710,32890,53820,135720,254475,420732, 1068012,2017356,3362260,8579560,16301164,27343888, 70068713] |