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A020530 as a simple table

na(n)
03
112
272
3528
44128
532832
6262272
72097408
816777728
9134218752
101073743872
118589938688
1268719484928
13549755830272
144398046543872
1535184372154368
16281474976841728
172251799813947392
1818014398510006272

[3,12,72,528,4128,32832,262272,2097408,16777728,
 134218752,1073743872,8589938688,68719484928,
 549755830272,4398046543872,35184372154368,
 281474976841728,2251799813947392,
 18014398510006272]