n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 18 |
3 | 252 |
4 | 3177 |
5 | 37764 |
6 | 432315 |
7 | 4821867 |
8 | 52767711 |
9 | 569171142 |
10 | 6070198824 |
11 | 64154357361 |
12 | 673034324472 |
13 | 7017585817887 |
14 | 72795938474871 |
15 | 751858421307975 |
16 | 7736579039166894 |
17 | 79354228046171004 |
18 | 811679794900979769 |
19 | 8282239107946760700 |
20 | 84331460977774328115 |
[0,1,18,252,3177,37764,432315,4821867,52767711, 569171142,6070198824,64154357361,673034324472, 7017585817887,72795938474871,751858421307975, 7736579039166894,79354228046171004, 811679794900979769,8282239107946760700, 84331460977774328115] |