n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 25 |
4 | 211 |
5 | 2236 |
6 | 28471 |
7 | 422899 |
8 | 7173580 |
9 | 136750051 |
10 | 2893057381 |
11 | 67241818876 |
12 | 1702829138209 |
13 | 46659181547785 |
14 | 1375237342827076 |
15 | 43380198327693361 |
16 | 1458027134026128691 |
17 | 52014149849253158284 |
18 | 1962794208713975883415 |
[1,4,25,211,2236,28471,422899,7173580,136750051, 2893057381,67241818876,1702829138209, 46659181547785,1375237342827076,43380198327693361, 1458027134026128691,52014149849253158284, 1962794208713975883415] |