n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 3 |
4 | 4 |
5 | 5 |
6 | 6 |
7 | 7 |
8 | 23 |
9 | 56 |
10 | 77 |
11 | 103 |
12 | 320 |
13 | 1477 |
14 | 1821 |
15 | 2992 |
16 | 15290 |
17 | 180168 |
18 | 410498 |
19 | 548816 |
20 | 672732 |
21 | 2601223 |
[1,2,3,4,5,6,7,23,56,77,103,320,1477,1821,2992, 15290,180168,410498,548816,672732,2601223] |