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A074028 as a simple table

na(n)
10
20
31
41
52
62
74
86
913
1024
1148
1285
13160
14288
15541
161008
171920
183626
196912
2013107
2124989
2247616
2391136
24174590
25335462
26645120
271242904
282396745
294628480
308947294
3117317888
3233552384
3365074253
34126320640
35245428574
36477218560
37928645120
381808400384
393524068955

[0,0,1,1,2,2,4,6,13,24,48,85,160,288,541,1008,
 1920,3626,6912,13107,24989,47616,91136,174590,
 335462,645120,1242904,2396745,4628480,8947294,
 17317888,33552384,65074253,126320640,245428574,
 477218560,928645120,1808400384,3524068955]