n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 25 |
4 | 196 |
5 | 1764 |
6 | 17424 |
7 | 184041 |
8 | 2044900 |
9 | 23639044 |
10 | 282105616 |
11 | 3455793796 |
12 | 43268992144 |
13 | 551900410000 |
14 | 7152629313600 |
15 | 93990019574025 |
16 | 1250164827828900 |
17 | 16807771574144100 |
18 | 228138727737690000 |
19 | 3123219182728976100 |
20 | 43087676888260976400 |
21 | 598598221893939680400 |
22 | 8369059450146650049600 |
[1,1,4,25,196,1764,17424,184041,2044900,23639044, 282105616,3455793796,43268992144,551900410000, 7152629313600,93990019574025,1250164827828900, 16807771574144100,228138727737690000, 3123219182728976100,43087676888260976400, 598598221893939680400,8369059450146650049600] |