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A102839 as a simple table

na(n)
00
11
23
312
440
5135
6441
71428
84572
914535
1045925
11144408
12452244
131411501
144392675
1513636080
1642237792
17130580451
18403009209
191241912580
203821849640
2111746816389
2236064532427
23110610649548
24338928124500
251037636534025

[0,1,3,12,40,135,441,1428,4572,14535,45925,144408,
 452244,1411501,4392675,13636080,42237792,
 130580451,403009209,1241912580,3821849640,
 11746816389,36064532427,110610649548,338928124500,
 1037636534025]