n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 14 |
3 | 70 |
4 | 503 |
5 | 4898 |
6 | 60517 |
7 | 899764 |
8 | 15496561 |
9 | 301137820 |
10 | 6483583802 |
11 | 152689979223 |
12 | 3896718655702 |
13 | 107010852239903 |
14 | 3144913162405021 |
15 | 98469727935174977 |
16 | 3272516761148911378 |
17 | 115063890523670839944 |
[1,4,14,70,503,4898,60517,899764,15496561, 301137820,6483583802,152689979223,3896718655702, 107010852239903,3144913162405021, 98469727935174977,3272516761148911378, 115063890523670839944] |