n | a(n) |
---|---|
0 | 1 |
1 | 5 |
2 | 25 |
3 | 126 |
4 | 635 |
5 | 3200 |
6 | 16126 |
7 | 81265 |
8 | 409525 |
9 | 2063751 |
10 | 10400020 |
11 | 52409625 |
12 | 264111876 |
13 | 1330959400 |
14 | 6707206625 |
15 | 33800145001 |
16 | 170331684405 |
17 | 858365628650 |
18 | 4325628288251 |
19 | 21798473125660 |
20 | 109850731256950 |
21 | 553579284573001 |
[1,5,25,126,635,3200,16126,81265,409525,2063751, 10400020,52409625,264111876,1330959400,6707206625, 33800145001,170331684405,858365628650, 4325628288251,21798473125660,109850731256950, 553579284573001] |