n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 1 |
4 | 2 |
5 | 6 |
6 | 16 |
7 | 37 |
8 | 114 |
9 | 478 |
10 | 1907 |
11 | 6777 |
12 | 28414 |
13 | 148580 |
14 | 758930 |
15 | 3580294 |
16 | 18982050 |
17 | 117888762 |
18 | 720679726 |
19 | 4193516446 |
20 | 26798335830 |
21 | 191775198574 |
22 | 1353198262531 |
23 | 9303932353127 |
24 | 69303156652024 |
25 | 559295471922890 |
26 | 4454686099742810 |
27 | 35198016469190740 |
[1,1,1,1,2,6,16,37,114,478,1907,6777,28414,148580, 758930,3580294,18982050,117888762,720679726, 4193516446,26798335830,191775198574,1353198262531, 9303932353127,69303156652024,559295471922890, 4454686099742810,35198016469190740] |