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A162396 as a simple table

na(n)
15
22
310
44
520
68
740
816
980
1032
11160
1264
13320
14128
15640
16256
171280
18512
192560
201024
215120
222048
2310240
244096
2520480
268192
2740960
2816384
2981920
3032768
31163840
3265536
33327680
34131072
35655360
36262144
371310720
38524288
392621440
401048576
415242880

[5,2,10,4,20,8,40,16,80,32,160,64,320,128,640,256,
 1280,512,2560,1024,5120,2048,10240,4096,20480,
 8192,40960,16384,81920,32768,163840,65536,327680,
 131072,655360,262144,1310720,524288,2621440,
 1048576,5242880]