n | a(n) |
---|---|
1 | 1 |
2 | 3 |
3 | 15 |
4 | 114 |
5 | 1230 |
6 | 17541 |
7 | 310401 |
8 | 6502368 |
9 | 156119778 |
10 | 4202894190 |
11 | 124940121966 |
12 | 4056054468282 |
13 | 142598505603138 |
14 | 5393588598473229 |
15 | 218309634723396555 |
16 | 9413799845705265408 |
17 | 430826174378500622916 |
18 | 20856810739070097320814 |
19 | 1064963403446152512517140 |
20 | 57204475911565427208990300 |
[1,3,15,114,1230,17541,310401,6502368,156119778, 4202894190,124940121966,4056054468282, 142598505603138,5393588598473229, 218309634723396555,9413799845705265408, 430826174378500622916,20856810739070097320814, 1064963403446152512517140, 57204475911565427208990300] |