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A189865 as a simple table

na(n)
11
20
30
42
510
60
70
84
932
1076
11196
12632
133368
1412532
1579788
16468286
172815088
1818287968
19126620984
20938037664
217232141830
2259774887344

[1,0,0,2,10,0,0,4,32,76,196,632,3368,12532,79788,
 468286,2815088,18287968,126620984,938037664,
 7232141830,59774887344]