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A122439 as a simple table

na(n)
01
12
25
312
425
554
6113
7232
8477
9970
101965
113972
128001
1316094
1432329
1564864
16130053
17260594
18521925
191044988
202091689
214185990
228375969
2316757976
2433525165
2567064346
26134149981
27268332404
28536714129
291073503278
302147120761

[1,2,5,12,25,54,113,232,477,970,1965,3972,8001,
 16094,32329,64864,130053,260594,521925,1044988,
 2091689,4185990,8375969,16757976,33525165,
 67064346,134149981,268332404,536714129,1073503278,
 2147120761]