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A105488 as a simple table

na(n)
41
56
630
7150
8780
94263
1024556
11149040
12951615
136378625
1444785620
15328660566
162515643767
1720044428810
18165955025400
191425299331992
2012678325080012
21116635133853189
221108221018960830
2310862073229428120
24109694927532209481
251140199081827172719

[1,6,30,150,780,4263,24556,149040,951615,6378625,
 44785620,328660566,2515643767,20044428810,
 165955025400,1425299331992,12678325080012,
 116635133853189,1108221018960830,
 10862073229428120,109694927532209481,
 1140199081827172719]