n | a(n) |
---|---|
0 | 1 |
1 | 52 |
2 | 1452 |
3 | 32120 |
4 | 644020 |
5 | 12440064 |
6 | 238904904 |
7 | 4642163952 |
8 | 92199790224 |
9 | 1883079661824 |
10 | 39689578055808 |
11 | 865023253219584 |
12 | 19515249341231616 |
13 | 455924361142656000 |
14 | 11030149104146035200 |
15 | 276260563641659673600 |
[1,52,1452,32120,644020,12440064,238904904, 4642163952,92199790224,1883079661824, 39689578055808,865023253219584,19515249341231616, 455924361142656000,11030149104146035200, 276260563641659673600] |