n | a(n) |
---|---|
0 | 1 |
1 | 6 |
2 | 30 |
3 | 210 |
4 | 1260 |
5 | 7770 |
6 | 46410 |
7 | 279930 |
8 | 1678320 |
9 | 10077480 |
10 | 60458370 |
11 | 362797050 |
12 | 2176734420 |
13 | 13060694010 |
14 | 78363884130 |
15 | 470184976590 |
16 | 2821108227840 |
17 | 16926659444730 |
18 | 101559946544280 |
19 | 609359740010490 |
20 | 3656158379595540 |
21 | 21936950640097710 |
22 | 131621703479470050 |
[1,6,30,210,1260,7770,46410,279930,1678320, 10077480,60458370,362797050,2176734420, 13060694010,78363884130,470184976590, 2821108227840,16926659444730,101559946544280, 609359740010490,3656158379595540, 21936950640097710,131621703479470050] |