n | a(n) |
---|---|
1 | 5 |
2 | 20 |
3 | 65 |
4 | 240 |
5 | 957 |
6 | 4360 |
7 | 21075 |
8 | 107760 |
9 | 566375 |
10 | 3039903 |
11 | 16529655 |
12 | 90798535 |
13 | 502567665 |
14 | 2799313350 |
15 | 15674233045 |
16 | 88163236380 |
17 | 497851322925 |
18 | 2821131185200 |
19 | 16035833020335 |
20 | 91404088484949 |
21 | 522308650924665 |
22 | 2991403124124120 |
23 | 17168050141237515 |
24 | 98716282462085185 |
[5,20,65,240,957,4360,21075,107760,566375,3039903, 16529655,90798535,502567665,2799313350, 15674233045,88163236380,497851322925, 2821131185200,16035833020335,91404088484949, 522308650924665,2991403124124120, 17168050141237515,98716282462085185] |