n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 7 |
3 | 30 |
4 | 143 |
5 | 728 |
6 | 3876 |
7 | 21318 |
8 | 120175 |
9 | 690690 |
10 | 4032015 |
11 | 23841480 |
12 | 142498692 |
13 | 859515920 |
14 | 5225264024 |
15 | 31983672534 |
16 | 196947587823 |
17 | 1219199353190 |
18 | 7583142491925 |
19 | 47365474641870 |
20 | 296983176369495 |
21 | 1868545312633440 |
22 | 11793499763070480 |
[1,2,7,30,143,728,3876,21318,120175,690690, 4032015,23841480,142498692,859515920,5225264024, 31983672534,196947587823,1219199353190, 7583142491925,47365474641870,296983176369495, 1868545312633440,11793499763070480] |