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A216614 as a simple table

n a(n)
1 2
2 15
3 67
4 4140
5 83437
6 18171918
7 732209051
8 346212390266
9 22294303538804
10 18633407258171930
11 1714659308610029464

[2,15,67,4140,83437,18171918,732209051,
 346212390266,22294303538804,18633407258171930,
 1714659308610029464]

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Last modified June 7 00:08 EDT 2023. Contains 363151 sequences. (Running on oeis4.)