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A222472 as a simple table

n a(n)
1 1
2 2
3 9
4 42
5 237
6 1548
7 11547
8 97020
9 907821
10 9369270
11 105785433
12 1297533006
13 17185285377
14 244486594296
15 3718854770571
16 60235136112024
17 1035153878216121
18 18813475216226250
19 360561490742947113
20 7267670240507621010

[1,2,9,42,237,1548,11547,97020,907821,9369270,
 105785433,1297533006,17185285377,244486594296,
 3718854770571,60235136112024,1035153878216121,
 18813475216226250,360561490742947113,
 7267670240507621010]

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Last modified April 25 07:07 EDT 2024. Contains 371964 sequences. (Running on oeis4.)