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A305261 as a simple table

na(n)
012
1132
2372
3852
41812
53732
67572
715252
830612
961332
10122772
11245652
12491412
13982932
141965972
153932052
167864212
1715728532
1831457172
1962914452
20125829012
21251658132
22503316372
231006632852
242013265812
254026531732
268053063572
2716106127252
2832212254612
2964424509332
30128849018772
31257698037652

[12,132,372,852,1812,3732,7572,15252,30612,61332,
 122772,245652,491412,982932,1965972,3932052,
 7864212,15728532,31457172,62914452,125829012,
 251658132,503316372,1006632852,2013265812,
 4026531732,8053063572,16106127252,32212254612,
 64424509332,128849018772,257698037652]