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A052129 as a simple table

na(n)
01
11
22
312
4576
51658880
616511297126400
71908360529573854283038720000
829134719286683212541013468732221146917416153907200000000

[1,1,2,12,576,1658880,16511297126400,
 1908360529573854283038720000,
 29134719286683212541013468732221146917416153907200\
 000000]