a(n) = 10^(2n-1) minus largest square less than 10^(2n-1).

A128826

a(n) = 10^(2n-1) minus largest square less than 10^(2n-1).

Terms

    a(0) =1a(1) =39a(2) =144a(3) =1756a(4) =49116a(5) =484471a(6) =4175271a(7) =38053824a(8) =10649244a(9) =1064924400a(10) =43246886799a(11) =529955487744

External references