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A180213 as a simple table

na(n)
11
22
34
46
512
636
7102
8324
9972
103190
1112610
1250254
13214510
141000260
154848796
1624798190
17134817190

[1,2,4,6,12,36,102,324,972,3190,12610,50254,
 214510,1000260,4848796,24798190,134817190]