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A188186 as a simple table

na(n)
1289
2910
32430
45744
512346
624591
746029
881805
9139143
10227930
11361384
12556834
13836618
141229093
151769773
162502617
173481445
184771508
196451232
208614108
2111370764
2214851235
2319207395
2424615603
2531279561
2639433366
2749344790
2861318804
2975701312

[289,910,2430,5744,12346,24591,46029,81805,139143,
 227930,361384,556834,836618,1229093,1769773,
 2502617,3481445,4771508,6451232,8614108,11370764,
 14851235,19207395,24615603,31279561,39433366,
 49344790,61318804,75701312]