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A221144 as a simple table

na(n)
10
20
30
40
50
61
713
891
9456
101834
116293
1219125
1352781
14134643
15321622
16726650
171564696
183231635
196432859
2012395504
2123195905
2242287433
2375274166
24131143033
25223982780
26375713010
27619712403
281006599177
291611563058
302546148075
313972522337
326126699846
339345436668

[0,0,0,0,0,1,13,91,456,1834,6293,19125,52781,
 134643,321622,726650,1564696,3231635,6432859,
 12395504,23195905,42287433,75274166,131143033,
 223982780,375713010,619712403,1006599177,
 1611563058,2546148075,3972522337,6126699846,
 9345436668]