n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 10 |
3 | 32 |
4 | 137 |
5 | 766 |
6 | 5382 |
7 | 46022 |
8 | 467206 |
9 | 5519252 |
10 | 74629263 |
11 | 1139283601 |
12 | 19411643752 |
13 | 365595475542 |
14 | 7548810986515 |
15 | 169681672611815 |
16 | 4126880020198630 |
17 | 108026180912533227 |
18 | 3029184083924476085 |
19 | 90617948406514693702 |
20 | 2881333799993441893564 |
21 | 97057552263114611503090 |
[1,4,10,32,137,766,5382,46022,467206,5519252, 74629263,1139283601,19411643752,365595475542, 7548810986515,169681672611815,4126880020198630, 108026180912533227,3029184083924476085, 90617948406514693702,2881333799993441893564, 97057552263114611503090] |