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A242527 as a simple table

na(n)
10
20
30
40
51
61
72
86
96
1022
1180
12504
13840
146048
153888
1637524
1772976
18961776
19661016
2011533030
217544366
22133552142
23208815294
245469236592
256429567323
26153819905698
27182409170334
284874589558919
297508950009102
30209534365631599

[0,0,0,0,1,1,2,6,6,22,80,504,840,6048,3888,37524,
 72976,961776,661016,11533030,7544366,133552142,
 208815294,5469236592,6429567323,153819905698,
 182409170334,4874589558919,7508950009102,
 209534365631599]