n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 1 |
3 | 1 |
4 | 2 |
5 | 6 |
6 | 17 |
7 | 62 |
8 | 259 |
9 | 1230 |
10 | 6592 |
11 | 39313 |
12 | 258575 |
13 | 1860318 |
14 | 14538245 |
15 | 122670593 |
16 | 1111715644 |
17 | 10771412394 |
18 | 111125142979 |
19 | 1216309735378 |
20 | 14078811306851 |
21 | 171837279141312 |
22 | 2205768169095338 |
23 | 29707098687614285 |
[1,0,1,1,2,6,17,62,259,1230,6592,39313,258575, 1860318,14538245,122670593,1111715644,10771412394, 111125142979,1216309735378,14078811306851, 171837279141312,2205768169095338, 29707098687614285] |