n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 26 |
5 | 156 |
6 | 1234 |
7 | 12340 |
8 | 150994 |
9 | 2204112 |
10 | 37617314 |
11 | 738465620 |
12 | 16451763834 |
13 | 411281292920 |
14 | 11427727238034 |
15 | 350040470610996 |
16 | 11736423864328466 |
17 | 428080429306305136 |
18 | 16893650334361392866 |
[1,1,2,6,26,156,1234,12340,150994,2204112, 37617314,738465620,16451763834,411281292920, 11427727238034,350040470610996,11736423864328466, 428080429306305136,16893650334361392866] |