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A058821 as a simple table

n a(n)
0 1
1 6
2 21
3 146
4 981
5 6222
6 38921
7 239946
8 1469826
9 8957976
10 54420339
11 329815506
12 1995387801

[1,6,21,146,981,6222,38921,239946,1469826,8957976,
 54420339,329815506,1995387801]

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Last modified May 19 18:35 EDT 2022. Contains 353847 sequences. (Running on oeis4.)