n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 11 |
3 | 31 |
4 | 87 |
5 | 246 |
6 | 700 |
7 | 2003 |
8 | 5758 |
9 | 16616 |
10 | 48102 |
11 | 139625 |
12 | 406214 |
13 | 1184138 |
14 | 3457771 |
15 | 10112245 |
16 | 29613029 |
17 | 86824136 |
18 | 254840534 |
19 | 748725393 |
20 | 2201731878 |
21 | 6479790418 |
22 | 19084605389 |
23 | 56247812793 |
24 | 165884498711 |
25 | 489512360356 |
[1,4,11,31,87,246,700,2003,5758,16616,48102, 139625,406214,1184138,3457771,10112245,29613029, 86824136,254840534,748725393,2201731878, 6479790418,19084605389,56247812793,165884498711, 489512360356] |