n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 1 |
4 | 4 |
5 | 14 |
6 | 22 |
7 | 274 |
8 | 676 |
9 | 3242 |
10 | 11126 |
11 | 82244 |
12 | 533332 |
13 | 3119164 |
14 | 25366420 |
15 | 294184154 |
16 | 2840519658 |
17 | 33041657228 |
18 | 516226778736 |
19 | 8641833554020 |
[0,1,1,4,14,22,274,676,3242,11126,82244,533332, 3119164,25366420,294184154,2840519658,33041657228, 516226778736,8641833554020] |