n | a(n) |
---|---|
0 | 1 |
1 | 15 |
2 | 155 |
3 | 1332 |
4 | 8342 |
5 | 41586 |
6 | 174844 |
7 | 642815 |
8 | 2117690 |
9 | 6362806 |
10 | 17671203 |
11 | 45844681 |
12 | 112047610 |
13 | 259796057 |
14 | 574776968 |
15 | 1219349012 |
16 | 2490738686 |
17 | 4916477305 |
18 | 9406990883 |
19 | 17494038498 |
20 | 31695618318 |
21 | 56063910644 |
22 | 96993880940 |
23 | 164397619093 |
24 | 273384891666 |
25 | 446635565576 |
[1,15,155,1332,8342,41586,174844,642815,2117690, 6362806,17671203,45844681,112047610,259796057, 574776968,1219349012,2490738686,4916477305, 9406990883,17494038498,31695618318,56063910644, 96993880940,164397619093,273384891666, 446635565576] |