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A371642 as a simple table

na(n)
01
12
2806400
329900785676206001356800000
41118776785681133797769642926006209350326602179759885516800000000000000

[1,2,806400,29900785676206001356800000,
 11187767856811337977696429260062093503266021797598\
 85516800000000000000]