n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 26 |
4 | 232 |
5 | 2624 |
6 | 35888 |
7 | 575280 |
8 | 10569984 |
9 | 218911872 |
10 | 5044346112 |
11 | 127980834816 |
12 | 3544627393536 |
13 | 106408500206592 |
14 | 3441351475359744 |
15 | 119279906031888384 |
16 | 4410902376303722496 |
17 | 173335758665503997952 |
18 | 7213199863532804702208 |
19 | 316878056718379090771968 |
[1,4,26,232,2624,35888,575280,10569984,218911872, 5044346112,127980834816,3544627393536, 106408500206592,3441351475359744, 119279906031888384,4410902376303722496, 173335758665503997952,7213199863532804702208, 316878056718379090771968] |