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A089130 as a simple table

na(n)
12
213
361
42521
520161
63113510401
710461394944001
8132626429906095529318154240000001
930207631531686917818677566034256998753632256000000001

[2,13,61,2521,20161,3113510401,10461394944001,
 132626429906095529318154240000001,
 30207631531686917818677566034256998753632256000000\
 001]