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A253968 as a simple table

na(n)
12
24
36
410
511
618
729
8151
9920
101456
111716
121915
134148
144403
158005
169600
1741945
1847238

[2,4,6,10,11,18,29,151,920,1456,1716,1915,4148,
 4403,8005,9600,41945,47238]