n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 4 |
4 | 16 |
5 | 92 |
6 | 616 |
7 | 4729 |
8 | 40776 |
9 | 388057 |
10 | 4028230 |
11 | 45207583 |
12 | 544680014 |
13 | 7004865885 |
14 | 95694153485 |
15 | 1382946630490 |
16 | 21067128029388 |
17 | 337224872043659 |
18 | 5656357906530796 |
19 | 99168643108816180 |
20 | 1813250965008114981 |
[1,1,1,4,16,92,616,4729,40776,388057,4028230, 45207583,544680014,7004865885,95694153485, 1382946630490,21067128029388,337224872043659, 5656357906530796,99168643108816180, 1813250965008114981] |