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A339948 as a simple table

na(n)
11
21
34
47
54
616
74
816
910
1016
114
1240
134
1416
1516
1636
174
1840
194
2040
2116
2216
234
2480
2510
2616
2720
2840
294
3064
314
3252
3316
3416
3516

[1,1,4,7,4,16,4,16,10,16,4,40,4,16,16,36,4,40,4,
 40,16,16,4,80,10,16,20,40,4,64,4,52,16,16,16]