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A273849 as a simple table

na(n)
01
15
226
371
4147
5268
6437
7662
8951
91312
101753
112282
122907
133636
144477
155438
166527
177752
189121
1910642
2012323
2114172
2216197
2318406
2420807
2523408
2626217
2729242
2832491
2935972
3039693
3143662
3247887
3352376
3457137
3562178
3667507
3773132
3879061
3985302
4091863
4198752

[1,5,26,71,147,268,437,662,951,1312,1753,2282,
 2907,3636,4477,5438,6527,7752,9121,10642,12323,
 14172,16197,18406,20807,23408,26217,29242,32491,
 35972,39693,43662,47887,52376,57137,62178,67507,
 73132,79061,85302,91863,98752]