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A089890 as a simple table

na(n)
10
20
30
44
58
616
732
864
9192
10384
11768
121536
133072
146144
1512288
1624576
1749152
1898304
19196608
20393216
21786432
221572864
233145728
246291456
2510485760
2620971520
2741943040
2883886080
29167772160
30335544320
31671088640
321342177280

[0,0,0,4,8,16,32,64,192,384,768,1536,3072,6144,
 12288,24576,49152,98304,196608,393216,786432,
 1572864,3145728,6291456,10485760,20971520,
 41943040,83886080,167772160,335544320,671088640,
 1342177280]