n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 15 |
4 | 111 |
5 | 1119 |
6 | 14487 |
7 | 230943 |
8 | 4395855 |
9 | 97608831 |
10 | 2482988079 |
11 | 71321533887 |
12 | 2286179073663 |
13 | 80984105660415 |
14 | 3144251526824991 |
15 | 132867034410319359 |
16 | 6073991827274809407 |
17 | 298815244349875677183 |
18 | 15746949613850439270975 |
19 | 885279424331353488224511 |
20 | 52902213099156326247243519 |
[1,1,3,15,111,1119,14487,230943,4395855,97608831, 2482988079,71321533887,2286179073663, 80984105660415,3144251526824991, 132867034410319359,6073991827274809407, 298815244349875677183,15746949613850439270975, 885279424331353488224511, 52902213099156326247243519] |