n | a(n) |
---|---|
1 | 1 |
2 | 7 |
3 | 31 |
4 | 121 |
5 | 456 |
6 | 1709 |
7 | 6427 |
8 | 24301 |
9 | 92368 |
10 | 352705 |
11 | 1352066 |
12 | 5200287 |
13 | 20058286 |
14 | 77558745 |
15 | 300540179 |
16 | 1166803093 |
17 | 4537567632 |
18 | 17672631881 |
19 | 68923264390 |
20 | 269128937199 |
21 | 1052049481838 |
22 | 4116715363777 |
23 | 16123801841526 |
24 | 63205303218851 |
25 | 247959266474026 |
26 | 973469712824029 |
[1,7,31,121,456,1709,6427,24301,92368,352705, 1352066,5200287,20058286,77558745,300540179, 1166803093,4537567632,17672631881,68923264390, 269128937199,1052049481838,4116715363777, 16123801841526,63205303218851,247959266474026, 973469712824029] |