A233140 - OEIS

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A233140 as a simple table

n	a(n)
1	1
2	16
3	13259
4	198313130
5	39758352524643
6	104628720219120084935
7	3612824935976380302597462081
8	1636876887880533270191858718052988313

[1,16,13259,198313130,39758352524643, 104628720219120084935, 3612824935976380302597462081, 1636876887880533270191858718052988313]