n | a(n) |
---|---|
0 | 1 |
1 | 6 |
2 | 30 |
3 | 128 |
4 | 504 |
5 | 1872 |
6 | 6672 |
7 | 23040 |
8 | 77616 |
9 | 256288 |
10 | 832416 |
11 | 2666496 |
12 | 8441600 |
13 | 26454528 |
14 | 82174464 |
15 | 253280256 |
16 | 775316736 |
17 | 2358812160 |
18 | 7137023488 |
19 | 21487386624 |
20 | 64401106944 |
21 | 192229535744 |
22 | 571630694400 |
23 | 1693996941312 |
24 | 5004131659776 |
25 | 14738997288960 |
26 | 43293528760320 |
[1,6,30,128,504,1872,6672,23040,77616,256288, 832416,2666496,8441600,26454528,82174464, 253280256,775316736,2358812160,7137023488, 21487386624,64401106944,192229535744,571630694400, 1693996941312,5004131659776,14738997288960, 43293528760320] |