n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 1 |
4 | 1 |
5 | 1 |
6 | 1 |
7 | 1 |
8 | 7 |
9 | 28 |
10 | 84 |
11 | 210 |
12 | 462 |
13 | 924 |
14 | 11220 |
15 | 74283 |
16 | 354563 |
17 | 1363571 |
18 | 4482323 |
19 | 13058891 |
20 | 226630385 |
21 | 2101302530 |
22 | 13794660782 |
23 | 71790720848 |
24 | 314709809876 |
25 | 1206605493016 |
26 | 27221495651416 |
27 | 324504194839891 |
28 | 2711270620975411 |
29 | 17790823624994551 |
[1,1,1,1,1,1,1,1,7,28,84,210,462,924,11220,74283, 354563,1363571,4482323,13058891,226630385, 2101302530,13794660782,71790720848,314709809876, 1206605493016,27221495651416,324504194839891, 2711270620975411,17790823624994551] |