n | a(n) |
---|---|
0 | 4 |
1 | 28 |
2 | 197 |
3 | 1387 |
4 | 9766 |
5 | 68764 |
6 | 484179 |
7 | 3409187 |
8 | 24004668 |
9 | 169020968 |
10 | 1190105509 |
11 | 8379736191 |
12 | 59003154006 |
13 | 415451286688 |
14 | 2925263479867 |
15 | 20597279875727 |
16 | 145028966176516 |
17 | 1021173725712004 |
18 | 7190258646781909 |
19 | 50627839422302787 |
20 | 356479265974341398 |
[4,28,197,1387,9766,68764,484179,3409187,24004668, 169020968,1190105509,8379736191,59003154006, 415451286688,2925263479867,20597279875727, 145028966176516,1021173725712004,7190258646781909, 50627839422302787,356479265974341398] |