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A186408 as a simple table

na(n)
12
23
36
410
542
658
7194
8230
912463
108392963
1124662691
1237400476
13163061323
14205481131
15278399797
16313114319
17481863166
18494959102
19656914015
20776749247
21960655996
22980373049
231097546872
241156724143
252013136112
262245034146
273416649829
283606810631
294141180699
305928231877
316569717174
326594050440
337240502155
347492029097
358995086259

[2,3,6,10,42,58,194,230,12463,8392963,24662691,
 37400476,163061323,205481131,278399797,313114319,
 481863166,494959102,656914015,776749247,960655996,
 980373049,1097546872,1156724143,2013136112,
 2245034146,3416649829,3606810631,4141180699,
 5928231877,6569717174,6594050440,7240502155,
 7492029097,8995086259]