n | a(n) |
---|---|
1 | 0 |
2 | 3 |
3 | 8 |
4 | 37 |
5 | 166 |
6 | 828 |
7 | 4238 |
8 | 22563 |
9 | 122986 |
10 | 684809 |
11 | 3877416 |
12 | 22270064 |
13 | 129457176 |
14 | 760412390 |
15 | 4507076156 |
16 | 26926958097 |
17 | 162005104664 |
18 | 980816681009 |
19 | 5971509956366 |
20 | 36540846282249 |
21 | 224628865150116 |
22 | 1386650559443616 |
[0,3,8,37,166,828,4238,22563,122986,684809, 3877416,22270064,129457176,760412390,4507076156, 26926958097,162005104664,980816681009, 5971509956366,36540846282249,224628865150116, 1386650559443616] |