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A051825 as a simple table

n a(n)
1 1
2 8
3 66
4 488
5 3360
6 23132
7 165550
8 1262132
9 10302943
10 88755142
11 788594730
12 7086051536
13 63890207069
14 581627969769
15 5421588729745
16 52259542704256

[1,8,66,488,3360,23132,165550,1262132,10302943,
 88755142,788594730,7086051536,63890207069,
 581627969769,5421588729745,52259542704256]

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Last modified July 11 08:10 EDT 2020. Contains 335626 sequences. (Running on oeis4.)