n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 5 |
3 | 20 |
4 | 132 |
5 | 1452 |
6 | 26741 |
7 | 826540 |
8 | 42939620 |
9 | 3752922788 |
10 | 552176360205 |
11 | 136830327773400 |
12 | 57125602787130000 |
13 | 40191587143536420000 |
14 | 47663133295107416936400 |
15 | 95288872904963020131203520 |
16 | 321195665986577042490185260608 |
[1,2,5,20,132,1452,26741,826540,42939620, 3752922788,552176360205,136830327773400, 57125602787130000,40191587143536420000, 47663133295107416936400, 95288872904963020131203520, 321195665986577042490185260608] |