n | a(n) |
---|---|
4 | 1 |
5 | 4 |
6 | 10 |
7 | 19 |
8 | 31 |
9 | 129 |
10 | 761 |
11 | 3423 |
12 | 12503 |
13 | 65847 |
14 | 587331 |
15 | 5621100 |
16 | 47590431 |
17 | 445495212 |
18 | 5880381069 |
19 | 98943434625 |
20 | 1748899641272 |
21 | 32546795958370 |
22 | 732964964303388 |
[1,4,10,19,31,129,761,3423,12503,65847,587331, 5621100,47590431,445495212,5880381069,98943434625, 1748899641272,32546795958370,732964964303388] |