n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 25 |
4 | 224 |
5 | 2601 |
6 | 37072 |
7 | 626137 |
8 | 12232320 |
9 | 271494865 |
10 | 6750538496 |
11 | 185923318329 |
12 | 5619645500416 |
13 | 184961854976185 |
14 | 6585429015521280 |
15 | 252203521861645561 |
16 | 10338251689510381568 |
17 | 451650823526438037153 |
18 | 20949317446607098716160 |
19 | 1028215744082428119960025 |
[1,1,4,25,224,2601,37072,626137,12232320, 271494865,6750538496,185923318329,5619645500416, 184961854976185,6585429015521280, 252203521861645561,10338251689510381568, 451650823526438037153,20949317446607098716160, 1028215744082428119960025] |