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A323921 as a simple table

n a(n)
1 0
2 1
3 4
4 17
5 66
6 269
7 1102
8 4635
9 19768
10 85659
11 375524
12 1664015

[0,1,4,17,66,269,1102,4635,19768,85659,375524,
 1664015]

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Last modified October 22 06:54 EDT 2019. Contains 328315 sequences. (Running on oeis4.)