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A171648 as a simple table

na(n)
11
22
32
44
58
616
724
848
980
10160
11256
12512
13832
141664
152688
165376
178704
1817408
1928160
2056320
2191136
22182272
23294912
24589824
25954368
261908736
273088384
286176768
299994240
3019988480
3132342016
3264684032
33104660992
34209321984
35338690048
36677380096
371096024064

[1,2,2,4,8,16,24,48,80,160,256,512,832,1664,2688,
 5376,8704,17408,28160,56320,91136,182272,294912,
 589824,954368,1908736,3088384,6176768,9994240,
 19988480,32342016,64684032,104660992,209321984,
 338690048,677380096,1096024064]