n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 0 |
4 | 2 |
5 | 5 |
6 | 9 |
7 | 14 |
8 | 20 |
9 | 69 |
10 | 125 |
11 | 209 |
12 | 329 |
13 | 923 |
14 | 1715 |
15 | 3002 |
16 | 5004 |
17 | 12869 |
18 | 24309 |
19 | 43757 |
20 | 75581 |
21 | 184755 |
22 | 352715 |
23 | 646645 |
24 | 1144065 |
25 | 2704155 |
26 | 5200299 |
27 | 9657699 |
28 | 17383859 |
29 | 40116599 |
[1,1,0,2,5,9,14,20,69,125,209,329,923,1715,3002, 5004,12869,24309,43757,75581,184755,352715,646645, 1144065,2704155,5200299,9657699,17383859,40116599] |