n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 1 |
4 | 3 |
5 | 13 |
6 | 77 |
7 | 573 |
8 | 5143 |
9 | 54025 |
10 | 650121 |
11 | 8817001 |
12 | 133049339 |
13 | 2210979381 |
14 | 40118485237 |
15 | 789221836741 |
16 | 16730904387183 |
17 | 380227386482641 |
18 | 9221550336940241 |
19 | 237724953543108753 |
20 | 6491255423787076915 |
21 | 187156557809878784797 |
22 | 5681772224922980536413 |
[1,1,1,3,13,77,573,5143,54025,650121,8817001, 133049339,2210979381,40118485237,789221836741, 16730904387183,380227386482641,9221550336940241, 237724953543108753,6491255423787076915, 187156557809878784797,5681772224922980536413] |