a(n) is the area of the n-gon with vertices (3^i, 5^i) for 0 <= i <= n-1.

A339487

a(n) is the area of the n-gon with vertices (3^i, 5^i) for 0 <= i <= n-1.

Terms

    a(0) =8a(1) =192a(2) =3344a(3) =52800a(4) =806168a(5) =12166272a(6) =182871584a(7) =2744987520a(8) =41184460328a(9) =617815378752

External references