n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 25 |
4 | 190 |
5 | 1606 |
6 | 14506 |
7 | 137089 |
8 | 1338790 |
9 | 13403950 |
10 | 136846144 |
11 | 1419257434 |
12 | 14911016596 |
13 | 158363649640 |
14 | 1697452010230 |
15 | 18338919413425 |
16 | 199496184219910 |
17 | 2183299541440150 |
18 | 24021874198331080 |
19 | 265559590979820910 |
20 | 2948253066186839140 |
21 | 32857382497018933060 |
[1,1,4,25,190,1606,14506,137089,1338790,13403950, 136846144,1419257434,14911016596,158363649640, 1697452010230,18338919413425,199496184219910, 2183299541440150,24021874198331080, 265559590979820910,2948253066186839140, 32857382497018933060] |