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A066534 as a simple table

na(n)
00
11
26
330
4152
5840
65232
737072
8297600
92680704
1026812160
11294945024
123539364864
1346011796480
14644165265408
159662479226880
16154599668154368
172628194359738368
1847307498477649920
19898842471080329216

[0,1,6,30,152,840,5232,37072,297600,2680704,
 26812160,294945024,3539364864,46011796480,
 644165265408,9662479226880,154599668154368,
 2628194359738368,47307498477649920,
 898842471080329216]