a(n) = numerator(N) where N = 0.246...(2n) is the concatenation of the first n even numbers after the decimal point.

A078261

a(n) = numerator(N) where N = 0.246...(2n) is the concatenation of the first n even numbers after the decimal point.

Terms

    a(0) =1a(1) =6a(2) =123a(3) =617a(4) =24681a(5) =6170253a(6) =1234050607a(7) =30851265177

External references