a(n) = 5*A005259(n) - 2*A005258(n).

A357956

a(n) = 5*A005259(n) - 2*A005258(n).

Terms

    a(0) =3a(1) =19a(2) =327a(3) =6931a(4) =162503a(5) =4072519a(6) =107094207a(7) =2919528211a(8) =81819974343

External references