n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 4 |
3 | 17 |
4 | 64 |
5 | 233 |
6 | 820 |
7 | 2825 |
8 | 9568 |
9 | 31985 |
10 | 105796 |
11 | 346913 |
12 | 1129312 |
13 | 3653657 |
14 | 11758132 |
15 | 37665881 |
16 | 120172096 |
17 | 382039649 |
18 | 1210689028 |
19 | 3825777329 |
20 | 12058462720 |
21 | 37918780361 |
22 | 118986517684 |
23 | 372650082857 |
24 | 1165021837984 |
[0,1,4,17,64,233,820,2825,9568,31985,105796, 346913,1129312,3653657,11758132,37665881, 120172096,382039649,1210689028,3825777329, 12058462720,37918780361,118986517684,372650082857, 1165021837984] |