A067414 - OEIS

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A067414 as a simple table

n	a(n)
0	1
1	8
2	112
3	1568
4	21952
5	307328
6	4302592
7	60236288
8	843308032
9	11806312448
10	165288374272
11	2314037239808
12	32396521357312
13	453551299002368
14	6349718186033152
15	88896054604464128
16	1244544764462497792

[1,8,112,1568,21952,307328,4302592,60236288, 843308032,11806312448,165288374272,2314037239808, 32396521357312,453551299002368,6349718186033152, 88896054604464128,1244544764462497792]