n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 7 |
4 | 36 |
5 | 253 |
6 | 1886 |
7 | 14800 |
8 | 118238 |
9 | 955639 |
10 | 7750456 |
11 | 62777522 |
12 | 506272363 |
13 | 4056634991 |
14 | 32252971687 |
15 | 254209569990 |
16 | 1985108901344 |
17 | 15352968310930 |
18 | 117579612410477 |
19 | 891596419221856 |
20 | 6694250497509934 |
21 | 49768995849050468 |
22 | 366423320400440927 |
23 | 2671969175372760210 |
[1,1,2,7,36,253,1886,14800,118238,955639,7750456, 62777522,506272363,4056634991,32252971687, 254209569990,1985108901344,15352968310930, 117579612410477,891596419221856,6694250497509934, 49768995849050468,366423320400440927, 2671969175372760210] |