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A081513 as a simple table

na(n)
11
20
33
46
512
68
724
820
928
1040
1140
1230
1360
1445
1560
16120
1790
1872
1972
20168
21240
22180
23144
24168
25168
26216
27420
28315
29210
30420
31420
32336
33432
341260
35840
36840
37504
38504
39315
40480
41540
422520
432520
441680
451680
461260
471260
481008
49720
502520
512520
521890
531512
54945
553360

[1,0,3,6,12,8,24,20,28,40,40,30,60,45,60,120,90,
 72,72,168,240,180,144,168,168,216,420,315,210,420,
 420,336,432,1260,840,840,504,504,315,480,540,2520,
 2520,1680,1680,1260,1260,1008,720,2520,2520,1890,
 1512,945,3360]