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A121851 as a simple table

n a(n)
10 18
11 21
12 73
13 279
14 1345
15 6619
16 9050
17 62691
18 91413
19 669562
20 787083

[18,21,73,279,1345,6619,9050,62691,91413,669562,
 787083]

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Last modified November 26 18:01 EST 2022. Contains 358362 sequences. (Running on oeis4.)