A060656 - OEIS

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A060656 as a simple table

n	a(n)
0	1
1	1
2	2
3	4
4	16
5	64
6	512
7	4096
8	65536
9	1048576
10	33554432
11	1073741824
12	68719476736
13	4398046511104
14	562949953421312
15	72057594037927936
16	18446744073709551616
17	4722366482869645213696
18	2417851639229258349412352

[1,1,2,4,16,64,512,4096,65536,1048576,33554432, 1073741824,68719476736,4398046511104, 562949953421312,72057594037927936, 18446744073709551616,4722366482869645213696, 2417851639229258349412352]