A017706 - OEIS

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A017706 as a simple table

n	a(n)
1	1
2	2097152
3	10460353203
4	4398046511104
5	476837158203125
6	609359740010496
7	558545864083284007
8	9223372036854775808
9	109418989131512359209
10	500000000000000000000
11	7400249944258160101211
12	11501279977342425366528

[1,2097152,10460353203,4398046511104, 476837158203125,609359740010496, 558545864083284007,9223372036854775808, 109418989131512359209,500000000000000000000, 7400249944258160101211,11501279977342425366528]