A111260 - OEIS

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A111260 as a simple table

n	a(n)
1	1
2	4
3	16
4	27
5	256
6	729
7	65536
8	2985984
9	4194304
10	9765625
11	134217728
12	387420489
13	2176782336
14	24794911296
15	30517578125
16	104857600000
17	678223072849
18	2641807540224
19	7625597484987
20	17592186044416
21	281474976710656

[1,4,16,27,256,729,65536,2985984,4194304,9765625, 134217728,387420489,2176782336,24794911296, 30517578125,104857600000,678223072849, 2641807540224,7625597484987,17592186044416, 281474976710656]