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A056494 as a simple table

na(n)
13
23
36
412
524
642
778
8144
9234
10456
11726
121392
132184
144290
156528
1612960
1719680
1839078
1959046
20117600
21177060
22353562
23531438
241061280
251594296
263186456
274782726
289561552
2914348904
3028690752
3143046718

[3,3,6,12,24,42,78,144,234,456,726,1392,2184,4290,
 6528,12960,19680,39078,59046,117600,177060,353562,
 531438,1061280,1594296,3186456,4782726,9561552,
 14348904,28690752,43046718]