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A075201 as a simple table

na(n)
10
20
30
40
53
611
760
8199
9748
102181
115391
1217193
1331881
1485942
15218760
16430339
17728315
182344106
193096983
209344528
2117859116
2231658109
2349644736
24172596719
25228795554

[0,0,0,0,3,11,60,199,748,2181,5391,17193,31881,
 85942,218760,430339,728315,2344106,3096983,
 9344528,17859116,31658109,49644736,172596719,
 228795554]