n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 6 |
3 | 51 |
4 | 452 |
5 | 5210 |
6 | 68514 |
7 | 1032906 |
8 | 17352320 |
9 | 323948376 |
10 | 6594052680 |
11 | 145585638000 |
12 | 3461441121192 |
13 | 88092914635128 |
14 | 2388119359650192 |
15 | 68667743686492440 |
16 | 2086307088847714560 |
17 | 66762608893508354880 |
18 | 2243693428523140377024 |
19 | 78982154604162553529664 |
[1,1,6,51,452,5210,68514,1032906,17352320, 323948376,6594052680,145585638000,3461441121192, 88092914635128,2388119359650192,68667743686492440, 2086307088847714560,66762608893508354880, 2243693428523140377024,78982154604162553529664] |