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A152499 as a simple table

na(n)
10
21
330
4664
513632
6274432
75497344
8109987840
92199945216
1043999756288
11879998926848
1217599995314176
13351999979683840
147039999912443904
15140799999624609792
162815999998397775872
1756319999993188450304
181126399999971143188480
1922527999999878130302976

[0,1,30,664,13632,274432,5497344,109987840,
 2199945216,43999756288,879998926848,
 17599995314176,351999979683840,7039999912443904,
 140799999624609792,2815999998397775872,
 56319999993188450304,1126399999971143188480,
 22527999999878130302976]