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A145886 as a simple table

na(n)
10
21
30
412
550
6405
73234
829680
9300348
103337425
1140382540
12528644556
137445076990
14112248853717
151803999433950
1630788257007040
17556112892188504
1810598857474652865
19212565974908314168
204475073155964510700

[0,1,0,12,50,405,3234,29680,300348,3337425,
 40382540,528644556,7445076990,112248853717,
 1803999433950,30788257007040,556112892188504,
 10598857474652865,212565974908314168,
 4475073155964510700]