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A352900 as a simple table

na(n)
30
40
50
67
728
879
9460
102486
1111209
1259787
13361777
142167635
1513577211
1691919186
17650059294
184761980740
1936508824672
20292116858616
212424047807182
2220847409357919
23185754041370693
241711253802075941
2516272637412753211
26159561718074359537
271611599794862761838
2816747401536440092104

[0,0,0,7,28,79,460,2486,11209,59787,361777,
 2167635,13577211,91919186,650059294,4761980740,
 36508824672,292116858616,2424047807182,
 20847409357919,185754041370693,1711253802075941,
 16272637412753211,159561718074359537,
 1611599794862761838,16747401536440092104]