n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 6 |
4 | 12 |
5 | 40 |
6 | 90 |
7 | 168 |
8 | 560 |
9 | 1296 |
10 | 2520 |
11 | 4400 |
12 | 14256 |
13 | 32760 |
14 | 64064 |
15 | 113400 |
16 | 187200 |
17 | 586432 |
18 | 1321920 |
19 | 2560896 |
20 | 4522000 |
21 | 7484400 |
22 | 11797632 |
23 | 35784320 |
24 | 78871968 |
25 | 150480000 |
26 | 263120000 |
27 | 433060992 |
28 | 681080400 |
29 | 1033305728 |
30 | 3044304000 |
[1,2,6,12,40,90,168,560,1296,2520,4400,14256, 32760,64064,113400,187200,586432,1321920,2560896, 4522000,7484400,11797632,35784320,78871968, 150480000,263120000,433060992,681080400, 1033305728,3044304000] |