n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 25 |
4 | 135 |
5 | 896 |
6 | 7042 |
7 | 63841 |
8 | 654901 |
9 | 7491574 |
10 | 94470926 |
11 | 1301130777 |
12 | 19423173211 |
13 | 312256205652 |
14 | 5376809244458 |
15 | 98700795776641 |
16 | 1923638785344457 |
17 | 39661911384761866 |
18 | 862362968121278038 |
19 | 19717031047061570777 |
20 | 472849461034147171791 |
21 | 11866892471399392308232 |
[1,2,6,25,135,896,7042,63841,654901,7491574, 94470926,1301130777,19423173211,312256205652, 5376809244458,98700795776641,1923638785344457, 39661911384761866,862362968121278038, 19717031047061570777,472849461034147171791, 11866892471399392308232] |