n | a(n) |
---|---|
3 | 1 |
4 | 2 |
5 | 15 |
6 | 42 |
7 | 421 |
8 | 1331 |
9 | 15119 |
10 | 618765 |
11 | 2155578 |
12 | 98032875 |
13 | 1290154807 |
14 | 4682196239 |
15 | 63117678751 |
16 | 3186252107917 |
17 | 164886529617695 |
18 | 616630679090258 |
19 | 32763760653353135 |
20 | 467443761039641135 |
21 | 1768227793278781667 |
22 | 96699391743949360451 |
23 | 1402535447576150395335 |
[1,2,15,42,421,1331,15119,618765,2155578,98032875, 1290154807,4682196239,63117678751,3186252107917, 164886529617695,616630679090258,32763760653353135, 467443761039641135,1768227793278781667, 96699391743949360451,1402535447576150395335] |