n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 14 |
4 | 81 |
5 | 616 |
6 | 5523 |
7 | 58064 |
8 | 697281 |
9 | 9417856 |
10 | 141368643 |
11 | 2334020864 |
12 | 42039523281 |
13 | 820296426496 |
14 | 17237259945363 |
15 | 388087200241664 |
16 | 9320064293358081 |
17 | 237814050877505536 |
18 | 6425096888209255683 |
19 | 183232685725482942464 |
20 | 5500505587921088841681 |
[1,1,3,14,81,616,5523,58064,697281,9417856, 141368643,2334020864,42039523281,820296426496, 17237259945363,388087200241664,9320064293358081, 237814050877505536,6425096888209255683, 183232685725482942464,5500505587921088841681] |