n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 23 |
3 | 150 |
4 | 1037 |
5 | 7408 |
6 | 54035 |
7 | 399850 |
8 | 2990105 |
9 | 22540260 |
10 | 170991647 |
11 | 1303789534 |
12 | 9983164453 |
13 | 76711854040 |
14 | 591236890667 |
15 | 4568611684306 |
16 | 35382196437041 |
17 | 274564234870732 |
18 | 2134337640202295 |
19 | 16617270658727878 |
[1,4,23,150,1037,7408,54035,399850,2990105, 22540260,170991647,1303789534,9983164453, 76711854040,591236890667,4568611684306, 35382196437041,274564234870732,2134337640202295, 16617270658727878] |