n | a(n) |
---|---|
1 | 4 |
2 | 22 |
3 | 108 |
4 | 691 |
5 | 3872 |
6 | 20897 |
7 | 112582 |
8 | 605780 |
9 | 3249132 |
10 | 17400206 |
11 | 93125105 |
12 | 498148634 |
13 | 2663790130 |
14 | 14241169579 |
15 | 76125716517 |
16 | 406890173406 |
17 | 2174685548474 |
18 | 11622471918192 |
19 | 62113961444133 |
20 | 331949857443568 |
21 | 1773988622548460 |
[4,22,108,691,3872,20897,112582,605780,3249132, 17400206,93125105,498148634,2663790130, 14241169579,76125716517,406890173406, 2174685548474,11622471918192,62113961444133, 331949857443568,1773988622548460] |