n | a(n) |
---|---|
0 | 1 |
1 | 6 |
2 | 45 |
3 | 364 |
4 | 3060 |
5 | 26334 |
6 | 230230 |
7 | 2035800 |
8 | 18156204 |
9 | 163011640 |
10 | 1471442973 |
11 | 13340783196 |
12 | 121399651100 |
13 | 1108176102180 |
14 | 10142940735900 |
15 | 93052749919920 |
16 | 855420636763836 |
17 | 7877932561061640 |
18 | 72667580816130436 |
19 | 671262558647881200 |
20 | 6208770443303347920 |
[1,6,45,364,3060,26334,230230,2035800,18156204, 163011640,1471442973,13340783196,121399651100, 1108176102180,10142940735900,93052749919920, 855420636763836,7877932561061640, 72667580816130436,671262558647881200, 6208770443303347920] |