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A317571 as a simple table

na(n)
164
25912
3199987
48305672
5376898848
616121282196
7703696012516
830722175114871
91337502015395808
1058309965342784953
112541502467315526566
12110764465819955958339
134827733372971557091616
14210414786612025217073490

[64,5912,199987,8305672,376898848,16121282196,
 703696012516,30722175114871,1337502015395808,
 58309965342784953,2541502467315526566,
 110764465819955958339,4827733372971557091616,
 210414786612025217073490]