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A189257 as a simple table

n a(n)
1 2
2 16
3 280
4 8900
5 552752
6 68635317
7 17747766886
8 9421503162646
9 10606582683139102
10 24593238398265693575
11 121227430181311808878846
12 1234571538047080619811567488
13 26705899629138438568650919545084

[2,16,280,8900,552752,68635317,17747766886,
 9421503162646,10606582683139102,
 24593238398265693575,121227430181311808878846,
 1234571538047080619811567488,
 26705899629138438568650919545084]

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Last modified February 19 03:37 EST 2018. Contains 299330 sequences. (Running on oeis4.)