n | a(n) |
---|---|
1 | 6 |
2 | 52 |
3 | 352 |
4 | 2444 |
5 | 17508 |
6 | 124340 |
7 | 872940 |
8 | 6112832 |
9 | 42822036 |
10 | 299718840 |
11 | 2094967284 |
12 | 14630909636 |
13 | 102130256404 |
14 | 712606093984 |
15 | 4970091031972 |
16 | 34652009741528 |
17 | 241529705097892 |
18 | 1683093292484152 |
19 | 11726099598816180 |
20 | 81680440933444532 |
[6,52,352,2444,17508,124340,872940,6112832, 42822036,299718840,2094967284,14630909636, 102130256404,712606093984,4970091031972, 34652009741528,241529705097892,1683093292484152, 11726099598816180,81680440933444532] |