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A307986 as a simple table

na(n)
142
254
3198
4204
5582
6594
7142310
8168730
91077890
101099390
111156870
121292570
131511930
141598470
151669910
162062570
172236570
182429030
192728726
203077354
214246130
224488910
234532710
245123090
255385310
265504110
275812130
286135962
296993610
307158710
317288930
328221598

[42,54,198,204,582,594,142310,168730,1077890,
 1099390,1156870,1292570,1511930,1598470,1669910,
 2062570,2236570,2429030,2728726,3077354,4246130,
 4488910,4532710,5123090,5385310,5504110,5812130,
 6135962,6993610,7158710,7288930,8221598]