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A304555 as a simple table

na(n)
10
21
3144
420449
514758132
639638819025
7396238966098460
814867893869236421601
92126342662340665160447328
101176421647617108793775585682449

[0,1,144,20449,14758132,39638819025,
 396238966098460,14867893869236421601,
 2126342662340665160447328,
 1176421647617108793775585682449]