n | a(n) |
---|---|
0 | 1 |
1 | 6 |
2 | 70 |
3 | 924 |
4 | 12870 |
5 | 184756 |
6 | 2704156 |
7 | 40116600 |
8 | 601080390 |
9 | 9075135300 |
10 | 137846528820 |
11 | 2104098963720 |
12 | 32247603683100 |
13 | 495918532948104 |
14 | 7648690600760440 |
15 | 118264581564861424 |
16 | 1832624140942590534 |
17 | 28453041475240576740 |
18 | 442512540276836779204 |
19 | 6892620648693261354600 |
[1,6,70,924,12870,184756,2704156,40116600, 601080390,9075135300,137846528820,2104098963720, 32247603683100,495918532948104,7648690600760440, 118264581564861424,1832624140942590534, 28453041475240576740,442512540276836779204, 6892620648693261354600] |