n | a(n) |
---|---|
2 | 1 |
3 | 5 |
4 | 20 |
5 | 75 |
6 | 274 |
7 | 988 |
8 | 3536 |
9 | 12597 |
10 | 44745 |
11 | 158632 |
12 | 561683 |
13 | 1987154 |
14 | 7026408 |
15 | 24835744 |
16 | 87763945 |
17 | 310088381 |
18 | 1095490524 |
19 | 3869911659 |
20 | 13670143618 |
21 | 48287147300 |
22 | 170561502896 |
23 | 602454835293 |
24 | 2127962632993 |
25 | 7516243783216 |
[1,5,20,75,274,988,3536,12597,44745,158632,561683, 1987154,7026408,24835744,87763945,310088381, 1095490524,3869911659,13670143618,48287147300, 170561502896,602454835293,2127962632993, 7516243783216] |