n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 15 |
4 | 90 |
5 | 435 |
6 | 1926 |
7 | 8175 |
8 | 33930 |
9 | 139035 |
10 | 565326 |
11 | 2287335 |
12 | 9224370 |
13 | 37116435 |
14 | 149110326 |
15 | 598350495 |
16 | 2399080410 |
17 | 9613258635 |
18 | 38503648926 |
19 | 154166045655 |
20 | 617117746050 |
21 | 2469830101635 |
22 | 9883394613126 |
23 | 39545794780815 |
24 | 158219815525290 |
25 | 632989146141435 |
[0,1,15,90,435,1926,8175,33930,139035,565326, 2287335,9224370,37116435,149110326,598350495, 2399080410,9613258635,38503648926,154166045655, 617117746050,2469830101635,9883394613126, 39545794780815,158219815525290,632989146141435] |