n | a(n) |
---|---|
0 | 1 |
1 | 55 |
2 | 1210 |
3 | 15730 |
4 | 143143 |
5 | 1002001 |
6 | 5725720 |
7 | 27810640 |
8 | 118195220 |
9 | 449141836 |
10 | 1551580888 |
11 | 4936848280 |
12 | 14620666060 |
13 | 40648664980 |
14 | 106847919376 |
15 | 267119798440 |
16 | 638337753625 |
17 | 1464421905375 |
18 | 3237143159250 |
19 | 6917263803450 |
[1,55,1210,15730,143143,1002001,5725720,27810640, 118195220,449141836,1551580888,4936848280, 14620666060,40648664980,106847919376,267119798440, 638337753625,1464421905375,3237143159250, 6917263803450] |