n | a(n) |
---|---|
0 | 1 |
1 | 7 |
2 | 34 |
3 | 153 |
4 | 686 |
5 | 3088 |
6 | 13917 |
7 | 62721 |
8 | 282646 |
9 | 1273690 |
10 | 5739647 |
11 | 25864698 |
12 | 116554700 |
13 | 525233175 |
14 | 2366870474 |
15 | 10665883415 |
16 | 48063918336 |
17 | 216591552484 |
18 | 976031547888 |
19 | 4398313653120 |
20 | 19820223058176 |
21 | 89316331907533 |
[1,7,34,153,686,3088,13917,62721,282646,1273690, 5739647,25864698,116554700,525233175,2366870474, 10665883415,48063918336,216591552484,976031547888, 4398313653120,19820223058176,89316331907533] |