n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 16 |
4 | 145 |
5 | 2046 |
6 | 40831 |
7 | 1078288 |
8 | 36229761 |
9 | 1508861980 |
10 | 76260702331 |
11 | 4591005777216 |
12 | 323906453871793 |
13 | 26419909067594056 |
14 | 2463658914613015575 |
15 | 260204512488337862656 |
16 | 30878562368653933102081 |
17 | 4088281211853327516484368 |
18 | 600094288103991706472584051 |
[1,1,3,16,145,2046,40831,1078288,36229761, 1508861980,76260702331,4591005777216, 323906453871793,26419909067594056, 2463658914613015575,260204512488337862656, 30878562368653933102081,4088281211853327516484368, 600094288103991706472584051] |