n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 34 |
4 | 250 |
5 | 972 |
6 | 15498 |
7 | 109544 |
8 | 5961306 |
9 | 54891535 |
10 | 2488870076 |
11 | 246264587430 |
12 | 118503860254 |
13 | 16917328320424 |
14 | 31020551370600 |
15 | 459016311081816 |
16 | 25084010473396186126 |
17 | 22789919291848918932 |
18 | 3423598216929042597 |
19 | 82480361346228654485320 |
20 | 12440086312584102532500 |
21 | 121292379506812780007192 |
[1,2,6,34,250,972,15498,109544,5961306,54891535, 2488870076,246264587430,118503860254, 16917328320424,31020551370600,459016311081816, 25084010473396186126,22789919291848918932, 3423598216929042597,82480361346228654485320, 12440086312584102532500,121292379506812780007192] |