n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 8 |
3 | 23 |
4 | 76 |
5 | 294 |
6 | 1328 |
7 | 6933 |
8 | 41350 |
9 | 278679 |
10 | 2101433 |
11 | 17574551 |
12 | 161740315 |
13 | 1626733107 |
14 | 17771416520 |
15 | 209739328923 |
16 | 2661301094007 |
17 | 36148700652162 |
18 | 523597247829866 |
19 | 8059284921781891 |
20 | 131408547139817540 |
[1,3,8,23,76,294,1328,6933,41350,278679,2101433, 17574551,161740315,1626733107,17771416520, 209739328923,2661301094007,36148700652162, 523597247829866,8059284921781891, 131408547139817540] |