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A259328 as a simple table

na(n)
12
21
32
451480
52631645209144487019355
6312242081385925594286511113381220856098317029402428309504000000000000

[2,1,2,51480,2631645209144487019355,
 31224208138592559428651111338122085609831702940242\
 8309504000000000000]