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A090747 as a simple table

na(n)
12
26
312
470
5102
6540
71090
81366
91626
104176
119010
129550
1336912
1443062
1549680
1657916
17483610
18877842
192215302
202704980
213598866
227973130
238530116

[2,6,12,70,102,540,1090,1366,1626,4176,9010,9550,
 36912,43062,49680,57916,483610,877842,2215302,
 2704980,3598866,7973130,8530116]