n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 19 |
3 | 253 |
4 | 3920 |
5 | 66221 |
6 | 1183077 |
7 | 21981764 |
8 | 420449439 |
9 | 8223704755 |
10 | 163727846678 |
11 | 3307039145618 |
12 | 67600147666909 |
13 | 1395822347989531 |
14 | 29070233296701815 |
15 | 609950649080323320 |
16 | 12881240945694949696 |
17 | 273590092192962485985 |
18 | 5840400740191969187922 |
[1,2,19,253,3920,66221,1183077,21981764,420449439, 8223704755,163727846678,3307039145618, 67600147666909,1395822347989531,29070233296701815, 609950649080323320,12881240945694949696, 273590092192962485985,5840400740191969187922] |