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A081142 as a simple table

na(n)
00
10
21
336
4864
517280
6311040
75225472
883607552
91289945088
1019349176320
11283787919360
124086546038784
1357954652913664
14811365140791296
1511234286564802560
16154070215745863680
172095354934143746048

[0,0,1,36,864,17280,311040,5225472,83607552,
 1289945088,19349176320,283787919360,4086546038784,
 57954652913664,811365140791296,11234286564802560,
 154070215745863680,2095354934143746048]