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A143727 as a simple table

na(n)
115
2105
316065
419425
543785
61091265
71615845
81954365
92822715
102839935
113243345
123400215
136005895
146503595
157187775
167641375
178062005
188741145
1910526565
2011086845
2111664555
2214520555
2314812875
2414834715
2514856765
2616025835
2716094715
2818916485
2919197255

[15,105,16065,19425,43785,1091265,1615845,1954365,
 2822715,2839935,3243345,3400215,6005895,6503595,
 7187775,7641375,8062005,8741145,10526565,11086845,
 11664555,14520555,14812875,14834715,14856765,
 16025835,16094715,18916485,19197255]