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A131112 as a simple table

na(n)
01
14
21
34
48
51
64
712
812
91
104
1116
1224
1316
141
154
1620
1740
1840
1920
201
214
2224
2360
2480
2560
2624
271
284
2928
3084
31140
32140
3384
3428
351
364
3732
38112
39224
40280
41224
42112
4332
441
454
4636
47144
48336
49504
50504
51336
52144
5336
541

[1,4,1,4,8,1,4,12,12,1,4,16,24,16,1,4,20,40,40,20,
 1,4,24,60,80,60,24,1,4,28,84,140,140,84,28,1,4,32,
 112,224,280,224,112,32,1,4,36,144,336,504,504,336,
 144,36,1]