n | a(n) |
---|---|
1 | 1 |
2 | 3 |
3 | 13 |
4 | 121 |
5 | 1538 |
6 | 28010 |
7 | 618243 |
8 | 16223774 |
9 | 490103223 |
10 | 16761330464 |
11 | 639968394245 |
12 | 26985325092730 |
13 | 1245476031528966 |
14 | 62451726249369666 |
15 | 3380720083302727868 |
16 | 196504354812897344692 |
17 | 12206388155663897395208 |
18 | 806977883622439156487124 |
19 | 56573396893789449427353609 |
20 | 4192088709829643732598955348 |
[1,3,13,121,1538,28010,618243,16223774,490103223, 16761330464,639968394245,26985325092730, 1245476031528966,62451726249369666, 3380720083302727868,196504354812897344692, 12206388155663897395208,806977883622439156487124, 56573396893789449427353609, 4192088709829643732598955348] |