A289859 - OEIS

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A289859 as a simple table

n	a(n)
1	13
2	103
3	2027023
4	34459423
5	654729073
6	2980227913743310874726229193921873
7	174865344543353986303948473285124243127671456831640623
8	352999527454840466971061863960307904899505075341088595453568994140623

[13,103,2027023,34459423,654729073, 2980227913743310874726229193921873, 17486534454335398630394847328512424312767145683164\ 0623, 35299952745484046697106186396030790489950507534108\ 8595453568994140623]