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A221722 as a simple table

n a(n)
1 21
2 3605
3 544757
4 81980587
5 12325049264
6 1852447247829
7 278394265759168
8 41836968289680535
9 6287169859547251975
10 944818763789937611918
11 141984605326159531366196
12 21337022505681038084244109 

[21,3605,544757,81980587,12325049264,
 1852447247829,278394265759168,41836968289680535,
 6287169859547251975,944818763789937611918,
 141984605326159531366196,
 21337022505681038084244109]

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Last modified August 16 12:02 EDT 2024. Contains 375174 sequences. (Running on oeis4.)