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A143982 as a simple table

na(n)
10
20
31
44
510
620
736
864
9120
10240
11496
121024
132080
144160
158255
1616368
1732504
1864464
19126940
20246640
21470536
22879056
231607862
242886800
255117800
269046960
2716166475
2829666676
2956666754
30113330260
31236315636
32507817728
331109184992
342433554624
355318390075

[0,0,1,4,10,20,36,64,120,240,496,1024,2080,4160,
 8255,16368,32504,64464,126940,246640,470536,
 879056,1607862,2886800,5117800,9046960,16166475,
 29666676,56666754,113330260,236315636,507817728,
 1109184992,2433554624,5318390075]