n | a(n) |
---|---|
1 | 2 |
2 | 4 |
3 | 12 |
4 | 49 |
5 | 248 |
6 | 1489 |
7 | 10429 |
8 | 83439 |
9 | 750954 |
10 | 7509543 |
11 | 82604983 |
12 | 991259805 |
13 | 12886377471 |
14 | 180409284603 |
15 | 2706139269054 |
16 | 43298228304877 |
17 | 736069881182916 |
18 | 13249257861292497 |
19 | 251735899364557450 |
20 | 5034717987291149011 |
[2,4,12,49,248,1489,10429,83439,750954,7509543, 82604983,991259805,12886377471,180409284603, 2706139269054,43298228304877,736069881182916, 13249257861292497,251735899364557450, 5034717987291149011] |