n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 9 |
3 | 51 |
4 | 323 |
5 | 2188 |
6 | 15511 |
7 | 113634 |
8 | 853467 |
9 | 6536382 |
10 | 50852019 |
11 | 400763223 |
12 | 3192727797 |
13 | 25669818476 |
14 | 208023278209 |
15 | 1697385471211 |
16 | 13933569346707 |
17 | 114988706524270 |
18 | 953467954114363 |
19 | 7939655757745265 |
20 | 66368199913921497 |
[1,2,9,51,323,2188,15511,113634,853467,6536382, 50852019,400763223,3192727797,25669818476, 208023278209,1697385471211,13933569346707, 114988706524270,953467954114363,7939655757745265, 66368199913921497] |