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A220157 as a simple table

n a(n)
1 21
2 95
3 727
4 5410
5 34959
6 214767
7 1272216
8 7244186
9 39698797
10 209815077
11 1070798249
12 5281686410
13 25200974573
14 116438844036 

[21,95,727,5410,34959,214767,1272216,7244186,
 39698797,209815077,1070798249,5281686410,
 25200974573,116438844036]

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Last modified April 23 05:20 EDT 2024. Contains 371906 sequences. (Running on oeis4.)