A135627 - OEIS

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A135627 as a simple table

n	a(n)
1	5
2	27
3	495
4	8127
5	33550335
6	8589869055
7	137438691327
8	2305843008139952127
9	2658455991569831744654692615953842175
10	191561942608236107294793378084303638130997321548169215

[5,27,495,8127,33550335,8589869055,137438691327, 2305843008139952127, 2658455991569831744654692615953842175, 19156194260823610729479337808430363813099732154816\ 9215]