n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 5 |
3 | 5 |
4 | 30 |
5 | 55 |
6 | 205 |
7 | 480 |
8 | 1505 |
9 | 3905 |
10 | 11430 |
11 | 30955 |
12 | 88105 |
13 | 242880 |
14 | 683405 |
15 | 1897805 |
16 | 5314830 |
17 | 14803855 |
18 | 41378005 |
19 | 115397280 |
20 | 322287305 |
21 | 899273705 |
22 | 2510710230 |
23 | 7007078755 |
24 | 19560629905 |
25 | 54596023680 |
26 | 152399173205 |
27 | 425379291605 |
28 | 1187375157630 |
29 | 3314271615655 |
[1,0,5,5,30,55,205,480,1505,3905,11430,30955, 88105,242880,683405,1897805,5314830,14803855, 41378005,115397280,322287305,899273705,2510710230, 7007078755,19560629905,54596023680,152399173205, 425379291605,1187375157630,3314271615655] |