n | a(n) |
---|---|
5 | 1 |
6 | 5 |
7 | 20 |
8 | 70 |
9 | 230 |
10 | 721 |
11 | 2200 |
12 | 6575 |
13 | 19385 |
14 | 56575 |
15 | 163952 |
16 | 472645 |
17 | 1357550 |
18 | 3888820 |
19 | 11119325 |
20 | 31753269 |
21 | 90603650 |
22 | 258401245 |
23 | 736796675 |
24 | 2100818555 |
25 | 5990757124 |
26 | 17087376630 |
27 | 48753542665 |
28 | 139155765455 |
29 | 397356692275 |
30 | 1135163887190 |
31 | 3244482184720 |
32 | 9277856948255 |
[1,5,20,70,230,721,2200,6575,19385,56575,163952, 472645,1357550,3888820,11119325,31753269,90603650, 258401245,736796675,2100818555,5990757124, 17087376630,48753542665,139155765455,397356692275, 1135163887190,3244482184720,9277856948255] |