n | a(n) |
---|---|
0 | 2 |
1 | 20 |
2 | 398 |
3 | 7940 |
4 | 158402 |
5 | 3160100 |
6 | 63043598 |
7 | 1257711860 |
8 | 25091193602 |
9 | 500566160180 |
10 | 9986232009998 |
11 | 199224074039780 |
12 | 3974495248785602 |
13 | 79290680901672260 |
14 | 1581839122784659598 |
15 | 31557491774791519700 |
16 | 629567996373045734402 |
17 | 12559802435686123168340 |
[2,20,398,7940,158402,3160100,63043598,1257711860, 25091193602,500566160180,9986232009998, 199224074039780,3974495248785602, 79290680901672260,1581839122784659598, 31557491774791519700,629567996373045734402, 12559802435686123168340] |