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A257660 as a simple table

na(n)
12
2863
31726
43452
5371953
6743906
71487812
81747591
91859765
102975624
113495182
123719530
135242773
146990364
157439060
168737955
1710485546
1814878120
1915993979
2017475910
2120971092
2226213865
2329756240
2431987958
2534951820
2641942184
2747981937
2852427730
2959512480

[2,863,1726,3452,371953,743906,1487812,1747591,
 1859765,2975624,3495182,3719530,5242773,6990364,
 7439060,8737955,10485546,14878120,15993979,
 17475910,20971092,26213865,29756240,31987958,
 34951820,41942184,47981937,52427730,59512480]