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A014980 as a simple table

na(n)
05
16
29
320
4100
52500
61562500
7610351562500
893132257461547851562500
92168404344971008868014905601739883422851562500
101175494350822287507968736537222245677818665556772087521508751706278417259454727172851562500

[5,6,9,20,100,2500,1562500,610351562500,
 93132257461547851562500,
 2168404344971008868014905601739883422851562500,
 11754943508222875079687365372222456778186655567720\
 87521508751706278417259454727172851562500]