a(n) = A138793(n+1)-A138793(n).

A138794

a(n) = A138793(n+1)-A138793(n).

Terms

    a(0) =20a(1) =300a(2) =4000a(3) =50000a(4) =600000a(5) =7000000a(6) =80000000a(7) =900000000a(8) =1000000000

External references