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A215988 as a simple table

na(n)
81
91
103
116
1213
1326
1456
15115
16247
17532
181172
192627
206017
2114020
2233263
2380196
24196133
25485993
261218103
273084686
287882748
2920309036
3052704689
31137675229
32361761187
33955688561
342537043121
356765174365
3618113821981
3748683671360
38131303094976
39355284353448

[1,1,3,6,13,26,56,115,247,532,1172,2627,6017,
 14020,33263,80196,196133,485993,1218103,3084686,
 7882748,20309036,52704689,137675229,361761187,
 955688561,2537043121,6765174365,18113821981,
 48683671360,131303094976,355284353448]