n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 4 |
4 | 19 |
5 | 136 |
6 | 1226 |
7 | 12259 |
8 | 130435 |
9 | 1441755 |
10 | 16390266 |
11 | 190484723 |
12 | 2254489731 |
13 | 27096464528 |
14 | 329995577356 |
15 | 4065180800962 |
16 | 50584233942184 |
[1,1,4,19,136,1226,12259,130435,1441755,16390266, 190484723,2254489731,27096464528,329995577356, 4065180800962,50584233942184] |