A069740 - OEIS

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A069740 as a simple table

n	a(n)
1	1
2	1
3	1
4	1
5	4
6	1
7	64
8	4
9	65536
10	512
11	33554432
12	65536
13	68719476736
14	6442450944
15	9007199254740992
16	281474976710656
17	220326730624766167090200576
18	340010386766614455386112
19	486777830487640090174734030864384

[1,1,1,1,4,1,64,4,65536,512,33554432,65536, 68719476736,6442450944,9007199254740992, 281474976710656,220326730624766167090200576, 340010386766614455386112, 486777830487640090174734030864384]