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A074728 as a simple table

n a(n)
1 1
2 3
3 10
4 39
5 176
6 903
7 5174
8 32623
9 223792
10 1655463
11 13110758
12 110510007
13 986490272
14 9287036671
15 91872460702
16 952034494431
17 10305790066208
18 116254839687543
19 1363631057783942
20 16599343732844455
21 209328335818064176
22 2730323984395924623
23 36780442970179975646

[1,3,10,39,176,903,5174,32623,223792,1655463,
 13110758,110510007,986490272,9287036671,
 91872460702,952034494431,10305790066208,
 116254839687543,1363631057783942,
 16599343732844455,209328335818064176,
 2730323984395924623,36780442970179975646]

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Last modified August 24 18:12 EDT 2019. Contains 326295 sequences. (Running on oeis4.)