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A132868 as a simple table

na(n)
01
13
27
320
460
5182
6547
71641
84921
914762
1044286
11132860
12398581
131195743
143587227
1510761680
1632285040
1796855122
18290565367
19871696101
202615088301
217845264902
2223535794706
2370607384120
24211822152361
25635466457083
261906399371247
275719198113740

[1,3,7,20,60,182,547,1641,4921,14762,44286,132860,
 398581,1195743,3587227,10761680,32285040,96855122,
 290565367,871696101,2615088301,7845264902,
 23535794706,70607384120,211822152361,635466457083,
 1906399371247,5719198113740]