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A045722 as a simple table

n a(n)
1 1
2 6
3 28
4 150
5 858
6 5096
7 31008
8 191862
9 1201750
10 7597590
11 48384180
12 309939240
13 1994981688
14 12892738800
15 83604224384
16 543722433078
17 3545056580814
18 23164787710610
19 151662849838500
20 994674967479270
21 6533629880128890

[1,6,28,150,858,5096,31008,191862,1201750,7597590,
 48384180,309939240,1994981688,12892738800,
 83604224384,543722433078,3545056580814,
 23164787710610,151662849838500,994674967479270,
 6533629880128890]

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Last modified October 1 08:39 EDT 2020. Contains 337442 sequences. (Running on oeis4.)