n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 5 |
3 | 4 |
4 | 25 |
5 | 40 |
6 | 141 |
7 | 300 |
8 | 865 |
9 | 2064 |
10 | 5525 |
11 | 13780 |
12 | 35881 |
13 | 91000 |
14 | 234525 |
15 | 598524 |
16 | 1536625 |
17 | 3930720 |
18 | 10077221 |
19 | 25800100 |
20 | 66108985 |
21 | 169309384 |
22 | 433745325 |
23 | 1110982860 |
24 | 2845964161 |
25 | 7289895600 |
26 | 18673752245 |
27 | 47833334644 |
28 | 122528343625 |
29 | 313861682200 |
30 | 803975056701 |
[1,0,5,4,25,40,141,300,865,2064,5525,13780,35881, 91000,234525,598524,1536625,3930720,10077221, 25800100,66108985,169309384,433745325,1110982860, 2845964161,7289895600,18673752245,47833334644, 122528343625,313861682200,803975056701] |