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A317757 as a simple table

n a(n)
1 0
2 1
3 4
4 17
5 56
6 205
7 690
8 2446
9 8506
10 30429

[0,1,4,17,56,205,690,2446,8506,30429]

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Last modified June 25 17:47 EDT 2019. Contains 324353 sequences. (Running on oeis4.)