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A273490 as a simple table

na(n)
01
16
215
336
469
5114
6175
7260
8389
9546
10735
11956
121237
131546
141903
152316
162805
173354
183967
194644
205413
216242
227151
238140
249237
2510410
2611679
2713028
2814501
2916034
3017679
3119444
3221349
3323378
3425535
3527820
3630261
3732826
3835535
3938388
4041413
4144578
4247903

[1,6,15,36,69,114,175,260,389,546,735,956,1237,
 1546,1903,2316,2805,3354,3967,4644,5413,6242,7151,
 8140,9237,10410,11679,13028,14501,16034,17679,
 19444,21349,23378,25535,27820,30261,32826,35535,
 38388,41413,44578,47903]