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A071552 as a simple table

na(n)
01
13628800
22375880867360000
34386797336285844480000000
412868639981414579848070084500000000
549120458506088132224064306071170476903628800

[1,3628800,2375880867360000,
 4386797336285844480000000,
 12868639981414579848070084500000000,
 49120458506088132224064306071170476903628800]