n | a(n) |
---|---|
2 | 1 |
3 | 0 |
4 | 4 |
5 | 5 |
6 | 58 |
7 | 217 |
8 | 2035 |
9 | 13470 |
10 | 134164 |
11 | 1243770 |
12 | 14129410 |
13 | 164244808 |
14 | 2151576620 |
15 | 29671566836 |
16 | 444758323628 |
17 | 7055358559376 |
18 | 119546765395744 |
19 | 2139179551573104 |
20 | 40486788832168944 |
21 | 805969129348431936 |
22 | 16860672502118423136 |
23 | 369459637224850523808 |
24 | 8467140450141232328160 |
[1,0,4,5,58,217,2035,13470,134164,1243770, 14129410,164244808,2151576620,29671566836, 444758323628,7055358559376,119546765395744, 2139179551573104,40486788832168944, 805969129348431936,16860672502118423136, 369459637224850523808,8467140450141232328160] |