n | a(n) |
---|---|
2 | 0 |
3 | 1 |
4 | 5 |
5 | 20 |
6 | 82 |
7 | 335 |
8 | 1402 |
9 | 5949 |
10 | 25652 |
11 | 111963 |
12 | 494157 |
13 | 2201270 |
14 | 9886034 |
15 | 44712737 |
16 | 203489627 |
17 | 931191850 |
18 | 4282171470 |
19 | 19778577235 |
20 | 91715812335 |
21 | 426824400684 |
22 | 1992828161414 |
23 | 9332192498397 |
24 | 43821128181652 |
25 | 206288470970025 |
26 | 973361629499032 |
27 | 4602638827207605 |
[0,1,5,20,82,335,1402,5949,25652,111963,494157, 2201270,9886034,44712737,203489627,931191850, 4282171470,19778577235,91715812335,426824400684, 1992828161414,9332192498397,43821128181652, 206288470970025,973361629499032,4602638827207605] |