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A196295 as a simple table

n a(n)
1 4
2 20
3 58
4 290
5 1201
6 4988
7 21344
8 90150
9 381754
10 1621695
11 6890299
12 29235310
13 124148208
14 527208582
15 2238746157
16 9507860508
17 40379986769
18 171493157818
19 728338492990
20 3093321027043
21 13137679999737
22 55797480705949

[4,20,58,290,1201,4988,21344,90150,381754,1621695,
 6890299,29235310,124148208,527208582,2238746157,
 9507860508,40379986769,171493157818,728338492990,
 3093321027043,13137679999737,55797480705949]

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Last modified October 29 12:00 EDT 2020. Contains 338066 sequences. (Running on oeis4.)