n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 20 |
4 | 177 |
5 | 1462 |
6 | 21919 |
7 | 254802 |
8 | 4816788 |
9 | 82401465 |
10 | 1929926410 |
11 | 35256890748 |
12 | 1152938630784 |
13 | 24977973856643 |
14 | 823036511854847 |
15 | 24332827884557037 |
16 | 954801492779273665 |
17 | 27023410818058291822 |
18 | 1309814517293654535339 |
19 | 41375530521928893861920 |
[1,1,4,20,177,1462,21919,254802,4816788,82401465, 1929926410,35256890748,1152938630784, 24977973856643,823036511854847,24332827884557037, 954801492779273665,27023410818058291822, 1309814517293654535339,41375530521928893861920] |