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A191746 as a simple table

na(n)
115
250
3193
4516
51415
63178
76777
811960
922363
1034026
1153069
1275568
13107967
14144830
15184033
16236016
17293615
18366514
19446037
20543380
21664483
22840882
231027505
241240948
251513431
261838330
272198329
282580252
292992415
303428014
314084113
324759796
335445379
346181542

[15,50,193,516,1415,3178,6777,11960,22363,34026,
 53069,75568,107967,144830,184033,236016,293615,
 366514,446037,543380,664483,840882,1027505,
 1240948,1513431,1838330,2198329,2580252,2992415,
 3428014,4084113,4759796,5445379,6181542]