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A051531 as a simple table

na(n)
01
11
24
315
424
544
681
7115
8168
9247
10322
11424
12561
13693
14860
151071
161276
171524
181825
192119
202464
212871
223270
233728
244257
254777
265364
276031
286688
297420
308241
319051
329944
3310935
3411914
3512984
3614161
3715325
3816588
3917967
4019332
4120804

[1,1,4,15,24,44,81,115,168,247,322,424,561,693,
 860,1071,1276,1524,1825,2119,2464,2871,3270,3728,
 4257,4777,5364,6031,6688,7420,8241,9051,9944,
 10935,11914,12984,14161,15325,16588,17967,19332,
 20804]