n | a(n) |
---|---|
0 | 1 |
1 | 6 |
2 | 44 |
3 | 352 |
4 | 2940 |
5 | 25194 |
6 | 219604 |
7 | 1937520 |
8 | 17250012 |
9 | 154663960 |
10 | 1394538288 |
11 | 12631852688 |
12 | 114858935204 |
13 | 1047772373340 |
14 | 9584557428600 |
15 | 87885886492320 |
16 | 807564936805020 |
17 | 7434289153896264 |
18 | 68551275793965328 |
19 | 633038816547052800 |
[1,6,44,352,2940,25194,219604,1937520,17250012, 154663960,1394538288,12631852688,114858935204, 1047772373340,9584557428600,87885886492320, 807564936805020,7434289153896264, 68551275793965328,633038816547052800] |