n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 25 |
3 | 188 |
4 | 1563 |
5 | 13840 |
6 | 127972 |
7 | 1221260 |
8 | 11938471 |
9 | 118936100 |
10 | 1203155633 |
11 | 12325599632 |
12 | 127611357300 |
13 | 1333153669632 |
14 | 14035828918560 |
15 | 148773617605036 |
16 | 1586305110768863 |
17 | 17002975960876300 |
18 | 183102052226442475 |
19 | 1980078493171083292 |
20 | 21493846031259095539 |
[1,4,25,188,1563,13840,127972,1221260,11938471, 118936100,1203155633,12325599632,127611357300, 1333153669632,14035828918560,148773617605036, 1586305110768863,17002975960876300, 183102052226442475,1980078493171083292, 21493846031259095539] |