n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 5 |
3 | 16 |
4 | 45 |
5 | 121 |
6 | 320 |
7 | 841 |
8 | 2205 |
9 | 5776 |
10 | 15125 |
11 | 39601 |
12 | 103680 |
13 | 271441 |
14 | 710645 |
15 | 1860496 |
16 | 4870845 |
17 | 12752041 |
18 | 33385280 |
19 | 87403801 |
20 | 228826125 |
21 | 599074576 |
22 | 1568397605 |
23 | 4106118241 |
24 | 10749957120 |
25 | 28143753121 |
26 | 73681302245 |
[0,1,5,16,45,121,320,841,2205,5776,15125,39601, 103680,271441,710645,1860496,4870845,12752041, 33385280,87403801,228826125,599074576,1568397605, 4106118241,10749957120,28143753121,73681302245] |