n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 4 |
4 | 12 |
5 | 137 |
6 | 102521 |
7 | 5067156572650 |
8 | 507566352736797478112105408650 |
9 | 545815719374972260690482400458116738905180797374198467059067284838 |
[1,2,4,12,137,102521,5067156572650, 507566352736797478112105408650, 54581571937497226069048240045811673890518079737419\ 8467059067284838] |