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A221564 as a simple table

na(n)
42
54
64
74
812
912
106
1124
1224
138
1440
1540
1610
1760
1860
1912
2084
2184
2214
23112
24112
2516
26144
27144
2818
29180
30180
3120
32220
33220
3422
35264
36264
3724
38312
39312
4026
41364
42364
4328
44420
45420
4630
47480
48480
4932
50544
51544
5234
53612
54612
5536
56684
57684
5838
59760
60760
6140
62840
63840

[2,4,4,4,12,12,6,24,24,8,40,40,10,60,60,12,84,84,
 14,112,112,16,144,144,18,180,180,20,220,220,22,
 264,264,24,312,312,26,364,364,28,420,420,30,480,
 480,32,544,544,34,612,612,36,684,684,38,760,760,
 40,840,840]