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A086950 as a simple table

na(n)
00
11
212
360
4224
5720
62112
75824
815360
939168
1097280
11236544
12565248
131331200
143096576
157127040
1616252928
1736765696
1882575360
19184287232
20408944640
21902823936
221983905792
234341104640
249462349824
2520552089600
2644493176832
2796032784384
28206695301120
29443723808768

[0,1,12,60,224,720,2112,5824,15360,39168,97280,
 236544,565248,1331200,3096576,7127040,16252928,
 36765696,82575360,184287232,408944640,902823936,
 1983905792,4341104640,9462349824,20552089600,
 44493176832,96032784384,206695301120,443723808768]